added ffplay utility

Originally committed as revision 1936 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 1397 insertions, 0 deletions

diff --git a/ffplay.c b/ffplay.c
new file mode 100644
index 0000000..902ef44
--- /dev/null
+++ b/ffplay.c
@@ -0,0 +1,1397 @@
+/*
+ * FFplay : Simple Media Player based on the ffmpeg libraries
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#define HAVE_AV_CONFIG_H
+#include "common.h"
+#include "avformat.h"
+
+#include "cmdutils.h"
+
+#include <SDL.h>
+#include <SDL_thread.h>
+
+#if defined(__linux__)
+#define HAVE_X11
+#endif
+
+#ifdef HAVE_X11
+#include <X11/Xlib.h>
+#endif
+
+#define MAX_VIDEOQ_SIZE (5 * 256 * 1024)
+#define MAX_AUDIOQ_SIZE (5 * 16 * 1024)
+
+/* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
+#define SAMPLE_ARRAY_SIZE (2*65536)
+
+typedef struct PacketQueue {
+    AVPacketList *first_pkt, *last_pkt;
+    int nb_packets;
+    int size;
+    int abort_request;
+    SDL_mutex *mutex;
+    SDL_cond *cond;
+} PacketQueue;
+
+#define VIDEO_PICTURE_QUEUE_SIZE 1
+
+typedef struct VideoPicture {
+    int delay; /* delay before showing the next picture */
+    SDL_Overlay *bmp;
+    int width, height; /* source height & width */
+    int allocated;
+} VideoPicture;
+
+enum {
+    AV_SYNC_AUDIO_MASTER, /* default choice */
+    AV_SYNC_VIDEO_MASTER,
+    AV_SYNC_EXTERNAL_CLOCK, /* if external clock, then you must update external_clock yourself */
+};
+
+typedef struct VideoState {
+    SDL_Thread *parse_tid;
+    SDL_Thread *video_tid;
+    int no_background;
+    int abort_request;
+    int paused;
+    AVFormatContext *ic;
+    int dtg_active_format;
+
+    int audio_stream;
+    
+    int av_sync_type;
+    double external_clock; /* external clock */
+
+    double audio_clock;  /* current audio clock value */
+    AVStream *audio_st;
+    PacketQueue audioq;
+    int audio_hw_buf_size;
+    /* samples output by the codec. we reserve more space for avsync
+       compensation */
+    uint8_t audio_buf[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2]; 
+    int audio_buf_size; /* in bytes */
+    int audio_buf_index; /* in bytes */
+    AVPacket audio_pkt;
+    uint8_t *audio_pkt_data;
+    int audio_pkt_size;
+    int64_t audio_pkt_ipts;
+    
+    int show_audio; /* if true, display audio samples */
+    int16_t sample_array[SAMPLE_ARRAY_SIZE];
+    int sample_array_index;
+    
+    double video_clock; /* current video clock value */
+    int video_stream;
+    AVStream *video_st;
+    PacketQueue videoq;
+
+    VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
+    int pictq_size, pictq_rindex, pictq_windex;
+    SDL_mutex *pictq_mutex;
+    SDL_cond *pictq_cond;
+    
+    //    QETimer *video_timer;
+    char filename[1024];
+    int width, height, xleft, ytop;
+} VideoState;
+
+void show_help(void);
+int audio_write_get_buf_size(VideoState *is);
+
+/* options specified by the user */
+static AVInputFormat *file_iformat;
+static const char *input_filename;
+static int fs_screen_width;
+static int fs_screen_height;
+static int screen_width = 640;
+static int screen_height = 480;
+static int audio_disable;
+static int video_disable;
+static int display_disable;
+static int show_status;
+
+/* current context */
+static int is_full_screen;
+static VideoState *cur_stream;
+static int16_t audio_callback_time;
+
+#define FF_ALLOC_EVENT   (SDL_USEREVENT)
+#define FF_REFRESH_EVENT (SDL_USEREVENT + 1)
+
+SDL_Surface *screen;
+
+/* packet queue handling */
+static void packet_queue_init(PacketQueue *q)
+{
+    memset(q, 0, sizeof(PacketQueue));
+    q->mutex = SDL_CreateMutex();
+    q->cond = SDL_CreateCond();
+}
+
+static void packet_queue_end(PacketQueue *q)
+{
+    AVPacketList *pkt, *pkt1;
+
+    for(pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
+        pkt1 = pkt->next;
+        av_free_packet(&pkt->pkt);
+    }
+    SDL_DestroyMutex(q->mutex);
+    SDL_DestroyCond(q->cond);
+}
+
+static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
+{
+    AVPacketList *pkt1;
+
+    pkt1 = av_malloc(sizeof(AVPacketList));
+    if (!pkt1)
+        return -1;
+    pkt1->pkt = *pkt;
+    pkt1->next = NULL;
+
+    SDL_LockMutex(q->mutex);
+
+    if (!q->last_pkt)
+
+        q->first_pkt = pkt1;
+    else
+        q->last_pkt->next = pkt1;
+    q->last_pkt = pkt1;
+    q->nb_packets++;
+    q->size += pkt1->pkt.size;
+    /* XXX: should duplicate packet data in DV case */
+    SDL_CondSignal(q->cond);
+
+    SDL_UnlockMutex(q->mutex);
+    return 0;
+}
+
+static void packet_queue_abort(PacketQueue *q)
+{
+    SDL_LockMutex(q->mutex);
+
+    q->abort_request = 1;
+    
+    SDL_CondSignal(q->cond);
+
+    SDL_UnlockMutex(q->mutex);
+}
+
+/* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
+static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block)
+{
+    AVPacketList *pkt1;
+    int ret;
+
+    SDL_LockMutex(q->mutex);
+
+    for(;;) {
+        if (q->abort_request) {
+            ret = -1;
+            break;
+        }
+            
+        pkt1 = q->first_pkt;
+        if (pkt1) {
+            q->first_pkt = pkt1->next;
+            if (!q->first_pkt)
+                q->last_pkt = NULL;
+            q->nb_packets--;
+            q->size -= pkt1->pkt.size;
+            *pkt = pkt1->pkt;
+            av_free(pkt1);
+            ret = 1;
+            break;
+        } else if (!block) {
+            ret = 0;
+            break;
+        } else {
+            SDL_CondWait(q->cond, q->mutex);
+        }
+    }
+    SDL_UnlockMutex(q->mutex);
+    return ret;
+}
+
+static inline void fill_rectangle(SDL_Surface *screen, 
+                                  int x, int y, int w, int h, int color)
+{
+    SDL_Rect rect;
+    rect.x = x;
+    rect.y = y;
+    rect.w = w;
+    rect.h = h;
+    SDL_FillRect(screen, &rect, color);
+}
+
+#if 0
+/* draw only the border of a rectangle */
+void fill_border(VideoState *s, int x, int y, int w, int h, int color)
+{
+    int w1, w2, h1, h2;
+
+    /* fill the background */
+    w1 = x;
+    if (w1 < 0)
+        w1 = 0;
+    w2 = s->width - (x + w);
+    if (w2 < 0)
+        w2 = 0;
+    h1 = y;
+    if (h1 < 0)
+        h1 = 0;
+    h2 = s->height - (y + h);
+    if (h2 < 0)
+        h2 = 0;
+    fill_rectangle(screen, 
+                   s->xleft, s->ytop, 
+                   w1, s->height, 
+                   color);
+    fill_rectangle(screen, 
+                   s->xleft + s->width - w2, s->ytop, 
+                   w2, s->height, 
+                   color);
+    fill_rectangle(screen, 
+                   s->xleft + w1, s->ytop, 
+                   s->width - w1 - w2, h1, 
+                   color);
+    fill_rectangle(screen, 
+                   s->xleft + w1, s->ytop + s->height - h2,
+                   s->width - w1 - w2, h2,
+                   color);
+}
+#endif
+
+static void video_image_display(VideoState *is)
+{
+    VideoPicture *vp;
+    float aspect_ratio;
+    int width, height, x, y;
+    SDL_Rect rect;
+
+    vp = &is->pictq[is->pictq_rindex];
+    if (vp->bmp) {
+        /* XXX: use variable in the frame */
+        aspect_ratio = is->video_st->codec.aspect_ratio;
+        if (aspect_ratio <= 0.0)
+            aspect_ratio = (float)is->video_st->codec.width / 
+                (float)is->video_st->codec.height;
+        /* if an active format is indicated, then it overrides the
+           mpeg format */
+#if 0
+        if (is->video_st->codec.dtg_active_format != is->dtg_active_format) {
+            is->dtg_active_format = is->video_st->codec.dtg_active_format;
+            printf("dtg_active_format=%d\n", is->dtg_active_format);
+        }
+#endif
+#if 0
+        switch(is->video_st->codec.dtg_active_format) {
+        case FF_DTG_AFD_SAME:
+        default:
+            /* nothing to do */
+            break;
+        case FF_DTG_AFD_4_3:
+            aspect_ratio = 4.0 / 3.0;
+            break;
+        case FF_DTG_AFD_16_9:
+            aspect_ratio = 16.0 / 9.0;
+            break;
+        case FF_DTG_AFD_14_9:
+            aspect_ratio = 14.0 / 9.0;
+            break;
+        case FF_DTG_AFD_4_3_SP_14_9:
+            aspect_ratio = 14.0 / 9.0;
+            break;
+        case FF_DTG_AFD_16_9_SP_14_9:
+            aspect_ratio = 14.0 / 9.0;
+            break;
+        case FF_DTG_AFD_SP_4_3:
+            aspect_ratio = 4.0 / 3.0;
+            break;
+        }
+#endif
+
+        /* XXX: we suppose the screen has a 1.0 pixel ratio */
+        height = is->height;
+        width = ((int)rint(height * aspect_ratio)) & -3;
+        if (width > is->width) {
+            width = is->width;
+            height = ((int)rint(width / aspect_ratio)) & -3;
+        }
+        x = (is->width - width) / 2;
+        y = (is->height - height) / 2;
+        if (!is->no_background) {
+            /* fill the background */
+            //            fill_border(is, x, y, width, height, QERGB(0x00, 0x00, 0x00));
+        } else {
+            is->no_background = 0;
+        }
+        rect.x = is->xleft + x;
+        rect.y = is->xleft + y;
+        rect.w = width;
+        rect.h = height;
+        SDL_DisplayYUVOverlay(vp->bmp, &rect);
+    } else {
+#if 0
+        fill_rectangle(screen, 
+                       is->xleft, is->ytop, is->width, is->height, 
+                       QERGB(0x00, 0x00, 0x00));
+#endif
+    }
+}
+
+static inline int compute_mod(int a, int b)
+{
+    a = a % b;
+    if (a >= 0) 
+        return a;
+    else
+        return a + b;
+}
+
+static void video_audio_display(VideoState *s)
+{
+    int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
+    int ch, channels, h, h2, bgcolor, fgcolor;
+    int16_t time_diff;
+    
+    /* compute display index : center on currently output samples */
+    channels = s->audio_st->codec.channels;
+    nb_display_channels = channels;
+    n = 2 * channels;
+    delay = audio_write_get_buf_size(s);
+    delay /= n;
+    
+    /* to be more precise, we take into account the time spent since
+       the last buffer computation */
+    if (audio_callback_time) {
+        time_diff = av_gettime() - audio_callback_time;
+        delay += (time_diff * s->audio_st->codec.sample_rate) / 1000000;
+    }
+
+    delay -= s->width / 2;
+    if (delay < s->width)
+        delay = s->width;
+    i_start = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
+    
+    bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
+    fill_rectangle(screen, 
+                   s->xleft, s->ytop, s->width, s->height, 
+                   bgcolor);
+
+    fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);
+
+    /* total height for one channel */
+    h = s->height / nb_display_channels;
+    /* graph height / 2 */
+    h2 = (h * 9) / 20;
+    for(ch = 0;ch < nb_display_channels; ch++) {
+        i = i_start + ch;
+        y1 = s->ytop + ch * h + (h / 2); /* position of center line */
+        for(x = 0; x < s->width; x++) {
+            y = (s->sample_array[i] * h2) >> 15;
+            if (y < 0) {
+                y = -y;
+                ys = y1 - y;
+            } else {
+                ys = y1;
+            }
+            fill_rectangle(screen, 
+                           s->xleft + x, ys, 1, y, 
+                           fgcolor);
+            i += channels;
+            if (i >= SAMPLE_ARRAY_SIZE)
+                i -= SAMPLE_ARRAY_SIZE;
+        }
+    }
+
+    fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);
+
+    for(ch = 1;ch < nb_display_channels; ch++) {
+        y = s->ytop + ch * h;
+        fill_rectangle(screen, 
+                       s->xleft, y, s->width, 1, 
+                       fgcolor);
+    }
+    SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);
+}
+
+/* display the current picture, if any */
+static void video_display(VideoState *is)
+{
+    if (is->audio_st && is->show_audio) 
+        video_audio_display(is);
+    else if (is->video_st)
+        video_image_display(is);
+}
+
+static Uint32 sdl_refresh_timer_cb(Uint32 interval, void *opaque)
+{
+    SDL_Event event;
+    event.type = FF_REFRESH_EVENT;
+    event.user.data1 = opaque;
+    SDL_PushEvent(&event);
+    return 0; /* 0 means stop timer */
+}
+
+/* schedule a video refresh in 'delay' ms */
+static void schedule_refresh(VideoState *is, int delay)
+{
+    SDL_AddTimer(delay, sdl_refresh_timer_cb, is);
+}
+
+/* called to display each frame */
+static void video_refresh_timer(void *opaque)
+{
+    VideoState *is = opaque;
+    VideoPicture *vp;
+
+    if (is->video_st) {
+        if (is->pictq_size == 0) {
+            /* if no picture, need to wait */
+            schedule_refresh(is, 40);
+        } else {
+            vp = &is->pictq[is->pictq_rindex];
+            
+            /* launch timer for next picture */
+            schedule_refresh(is, vp->delay);
+
+            /* display picture */
+            video_display(is);
+            
+            /* update queue size and signal for next picture */
+            if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
+                is->pictq_rindex = 0;
+            
+            SDL_LockMutex(is->pictq_mutex);
+            is->pictq_size--;
+            SDL_CondSignal(is->pictq_cond);
+            SDL_UnlockMutex(is->pictq_mutex);
+        }
+    } else if (is->audio_st) {
+        /* draw the next audio frame */
+
+        schedule_refresh(is, 40);
+
+        /* if only audio stream, then display the audio bars (better
+           than nothing, just to test the implementation */
+        
+        /* display picture */
+        video_display(is);
+    } else {
+        schedule_refresh(is, 100);
+    }
+    if (show_status) {
+        static int64_t last_time;
+        int64_t cur_time;
+        int aqsize, vqsize;
+        
+        cur_time = av_gettime();
+        if (!last_time || (cur_time - last_time) >= 500 * 1000) {
+            aqsize = 0;
+            vqsize = 0;
+            if (is->audio_st)
+                aqsize = is->audioq.size;
+            if (is->video_st)
+                vqsize = is->videoq.size;
+            printf("A:%7.2f V:%7.2f aq=%5dKB vq=%5dKB    \r", 
+                   is->audio_clock, is->video_clock, aqsize / 1024, vqsize / 1024);
+            fflush(stdout);
+            last_time = cur_time;
+        }
+    }
+}
+
+/* allocate a picture (needs to do that in main thread to avoid
+   potential locking problems */
+static void alloc_picture(void *opaque)
+{
+    VideoState *is = opaque;
+    VideoPicture *vp;
+    int is_yuv;
+
+    vp = &is->pictq[is->pictq_windex];
+
+    if (vp->bmp)
+        SDL_FreeYUVOverlay(vp->bmp);
+
+    /* XXX: use generic function */
+    switch(is->video_st->codec.pix_fmt) {
+    case PIX_FMT_YUV420P:
+    case PIX_FMT_YUV422P:
+    case PIX_FMT_YUV444P:
+    case PIX_FMT_YUV422:
+    case PIX_FMT_YUV410P:
+    case PIX_FMT_YUV411P:
+        is_yuv = 1;
+        break;
+    default:
+        is_yuv = 0;
+        break;
+    }
+
+    if (is_yuv) {
+        vp->bmp = SDL_CreateYUVOverlay(is->video_st->codec.width,
+                                       is->video_st->codec.height,
+                                       SDL_YV12_OVERLAY, 
+                                       screen);
+    } else {
+#if 0
+        vp->bmp = bmp_alloc(screen, 
+                            is->video_st->codec.width,
+                            is->video_st->codec.height,
+                            screen->bitmap_format, 
+                            0);
+#endif
+        vp->bmp = NULL;
+    }
+    vp->width = is->video_st->codec.width;
+    vp->height = is->video_st->codec.height;
+
+    SDL_LockMutex(is->pictq_mutex);
+    vp->allocated = 1;
+    SDL_CondSignal(is->pictq_cond);
+    SDL_UnlockMutex(is->pictq_mutex);
+}
+
+#define VIDEO_CORRECTION_THRESHOLD 0.2
+
+static int output_picture(VideoState *is, AVPicture *src_pict, double pts)
+{
+    VideoPicture *vp;
+    int dst_pix_fmt;
+    AVPicture pict;
+    double delay, ref_clock, diff;
+    
+    /* wait until we have space to put a new picture */
+    SDL_LockMutex(is->pictq_mutex);
+    while (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE &&
+           !is->videoq.abort_request) {
+        SDL_CondWait(is->pictq_cond, is->pictq_mutex);
+    }
+    SDL_UnlockMutex(is->pictq_mutex);
+    
+    if (is->videoq.abort_request)
+        return -1;
+
+    vp = &is->pictq[is->pictq_windex];
+
+    /* alloc or resize hardware picture buffer */
+    if (!vp->bmp || 
+        vp->width != is->video_st->codec.width ||
+        vp->height != is->video_st->codec.height) {
+        SDL_Event event;
+
+        vp->allocated = 0;
+
+        /* the allocation must be done in the main thread to avoid
+           locking problems */
+        event.type = FF_ALLOC_EVENT;
+        event.user.data1 = is;
+        SDL_PushEvent(&event);
+        
+        /* wait until the picture is allocated */
+        SDL_LockMutex(is->pictq_mutex);
+        while (!vp->allocated && !is->videoq.abort_request) {
+            SDL_CondWait(is->pictq_cond, is->pictq_mutex);
+        }
+        SDL_UnlockMutex(is->pictq_mutex);
+
+        if (is->videoq.abort_request)
+            return -1;
+    }
+
+    if (vp->bmp) {
+        /* get a pointer on the bitmap */
+        SDL_LockYUVOverlay (vp->bmp);
+
+        dst_pix_fmt = PIX_FMT_YUV420P;
+        pict.data[0] = vp->bmp->pixels[0];
+        pict.data[1] = vp->bmp->pixels[2];
+        pict.data[2] = vp->bmp->pixels[1];
+
+        pict.linesize[0] = vp->bmp->pitches[0];
+        pict.linesize[1] = vp->bmp->pitches[2];
+        pict.linesize[2] = vp->bmp->pitches[1];
+        
+        img_convert(&pict, dst_pix_fmt, 
+                    src_pict, is->video_st->codec.pix_fmt, 
+                    is->video_st->codec.width, is->video_st->codec.height);
+        /* update the bitmap content */
+        SDL_UnlockYUVOverlay(vp->bmp);
+
+        /* compute delay for the next frame and take into account the
+           pts if needed to make a correction. Since we do not support
+           correct MPEG B frame PTS, we put a high threshold */
+        
+        if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
+            ref_clock = is->video_clock;
+        } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
+            /* cannot use audio master if no audio, so fall back to no sync */
+            if (!is->audio_st)
+                ref_clock = is->video_clock;
+            else
+                ref_clock = is->audio_clock;
+        } else {
+            ref_clock = is->external_clock;
+        }
+        diff = is->video_clock - ref_clock;
+        delay = (double)is->video_st->codec.frame_rate_base / 
+            (double)is->video_st->codec.frame_rate;
+        if (fabs(diff) > VIDEO_CORRECTION_THRESHOLD) {
+            /* if too big difference, then we adjust */
+            delay += diff;
+            /* compute the difference */
+            if (delay < 0.01)
+                delay = 0.01;
+            else if (delay > 1.0)
+                delay = 1.0;
+        }
+        vp->delay = (int)(delay * 1000 + 0.5);
+
+        /* now we can update the picture count */
+        if (++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE)
+            is->pictq_windex = 0;
+        SDL_LockMutex(is->pictq_mutex);
+        is->pictq_size++;
+        SDL_UnlockMutex(is->pictq_mutex);
+    }
+
+    /* update video clock */
+    if (pts != 0) {
+        is->video_clock = pts;
+    } else {
+        is->video_clock += (double)is->video_st->codec.frame_rate_base / 
+            (double)is->video_st->codec.frame_rate;
+    }
+    return 0;
+}
+
+static int video_thread(void *arg)
+{
+    VideoState *is = arg;
+    AVPacket pkt1, *pkt = &pkt1;
+    unsigned char *ptr;
+    int len, len1, got_picture, i;
+    AVFrame frame;
+    AVPicture pict;
+    int64_t ipts;
+    double pts;
+
+    for(;;) {
+        while (is->paused && !is->videoq.abort_request) {
+            SDL_Delay(10);
+        }
+        if (packet_queue_get(&is->videoq, pkt, 1) < 0)
+            break;
+        ipts = pkt->pts;
+        ptr = pkt->data;
+        if (is->video_st->codec.codec_id == CODEC_ID_RAWVIDEO) {
+            avpicture_fill(&pict, ptr, 
+                           is->video_st->codec.pix_fmt,
+                           is->video_st->codec.width,
+                           is->video_st->codec.height);
+            pts = 0;
+            if (ipts != AV_NOPTS_VALUE)
+                pts = (double)ipts * is->ic->pts_num / is->ic->pts_den;
+            if (output_picture(is, &pict, pts) < 0)
+                goto the_end;
+        } else {
+            len = pkt->size;
+            while (len > 0) {
+                len1 = avcodec_decode_video(&is->video_st->codec, 
+                                            &frame, &got_picture, ptr, len);
+                if (len1 < 0)
+                    break;
+                if (got_picture) {
+                    for(i=0;i<4;i++) {
+                        pict.data[i] = frame.data[i];
+                        pict.linesize[i] = frame.linesize[i];
+                    }
+                    pts = 0;
+                    if (ipts != AV_NOPTS_VALUE)
+                        pts = (double)ipts * is->ic->pts_num / is->ic->pts_den;
+                    ipts = AV_NOPTS_VALUE;
+                    if (output_picture(is, &pict, pts) < 0)
+                        goto the_end;
+                }
+                ptr += len1;
+                len -= len1;
+            }
+        }
+        av_free_packet(pkt);
+    }
+ the_end:
+    return 0;
+}
+
+/* copy samples for viewing in editor window */
+static void update_sample_display(VideoState *is, short *samples, int samples_size)
+{
+    int size, len, channels;
+
+    channels = is->audio_st->codec.channels;
+
+    size = samples_size / sizeof(short);
+    while (size > 0) {
+        len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
+        if (len > size)
+            len = size;
+        memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
+        samples += len;
+        is->sample_array_index += len;
+        if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
+            is->sample_array_index = 0;
+        size -= len;
+    }
+}
+
+/* maximum audio speed change to get correct sync */
+#define SAMPLE_CORRECTION_PERCENT_MAX 2
+
+/* return the new audio buffer size (samples can be added or deleted
+   to get better sync if video or external master clock) */
+static int synchronize_audio(VideoState *is, short *samples, 
+                             int samples_size, double pts)
+{
+    int n, delay;
+    double ref_clock;
+    
+    n = 2 * is->audio_st->codec.channels;
+
+    if (is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)
+        ref_clock = is->external_clock;
+    else if (is->av_sync_type == AV_SYNC_VIDEO_MASTER && is->video_st)
+        ref_clock = is->video_clock;
+    else
+        ref_clock = is->audio_clock;
+    
+    /* if not master, then we try to remove or add samples to correct the clock */
+
+    if (((is->av_sync_type == AV_SYNC_VIDEO_MASTER && is->video_st) ||
+         is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK) && pts != 0) {
+        double diff;
+        int wanted_size, min_size, max_size, nb_samples;
+        delay = audio_write_get_buf_size(is);
+        diff = pts - (double)delay / (double)(n * is->audio_st->codec.sample_rate) - ref_clock;
+        wanted_size = (int)(diff * is->audio_st->codec.sample_rate) * n;
+        nb_samples = samples_size / n;
+
+        min_size = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
+        max_size = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
+        if (wanted_size < min_size)
+            wanted_size = min_size;
+        else if (wanted_size > max_size)
+            wanted_size = max_size;
+        
+        /* do the correct */
+        /* XXX: do it better with sample interpolation */
+        if (wanted_size < samples_size) {
+            /* remove samples */
+            samples_size = wanted_size;
+        } else if (wanted_size > samples_size) {
+            uint8_t *samples_end, *q;
+            int nb;
+
+            /* add samples */
+            nb = (samples_size - wanted_size);
+            samples_end = (uint8_t *)samples + samples_size - n;
+            q = samples_end + n;
+            while (nb > 0) {
+                memcpy(q, samples_end, n);
+                q += n;
+                nb -= n;
+            }
+            samples_size = wanted_size;
+        }
+    }
+
+    /* update audio clock */
+    if (is->av_sync_type == AV_SYNC_AUDIO_MASTER && pts != 0) {
+        /* a pts is given: we update the audio clock precisely */
+        delay = audio_write_get_buf_size(is);
+        is->audio_clock = pts - (double)delay / (double)(n * is->audio_st->codec.sample_rate);
+    } else {
+        is->audio_clock += (double)samples_size / (double)(n * is->audio_st->codec.sample_rate);
+    }
+    return samples_size;
+}
+
+/* decode one audio frame and returns its uncompressed size */
+static int audio_decode_frame(VideoState *is, uint8_t *audio_buf, double *pts_ptr)
+{
+    AVPacket *pkt = &is->audio_pkt;
+    int len1, data_size;
+    double pts;
+
+    for(;;) {
+        if (is->paused || is->audioq.abort_request) {
+            return -1;
+        }
+        while (is->audio_pkt_size > 0) {
+            len1 = avcodec_decode_audio(&is->audio_st->codec, 
+                                        (int16_t *)audio_buf, &data_size, 
+                                        is->audio_pkt_data, is->audio_pkt_size);
+            if (len1 < 0)
+                break;
+            is->audio_pkt_data += len1;
+            is->audio_pkt_size -= len1;
+            if (data_size > 0) {
+                pts = 0;
+                if (is->audio_pkt_ipts != AV_NOPTS_VALUE)
+                    pts = (double)is->audio_pkt_ipts * is->ic->pts_num / is->ic->pts_den;
+                *pts_ptr = pts;
+                is->audio_pkt_ipts = AV_NOPTS_VALUE;
+                /* we got samples : we can exit now */
+                return data_size;
+            }
+        }
+
+        /* free previous packet if any */
+        if (pkt->destruct)
+            av_free_packet(pkt);
+
+        /* read next packet */
+        if (packet_queue_get(&is->audioq, pkt, 1) < 0)
+            return -1;
+        is->audio_pkt_data = pkt->data;
+        is->audio_pkt_size = pkt->size;
+        is->audio_pkt_ipts = pkt->pts;
+    }
+}
+
+int audio_write_get_buf_size(VideoState *is)
+{
+    int delay;
+    delay = is->audio_hw_buf_size; 
+#if 0
+    /* just a test to check if the estimated delay is OK */
+    {
+        int val;
+        if (ioctl(sdl_audio_fd, SNDCTL_DSP_GETODELAY, &val) < 0) 
+            perror("SNDCTL_DSP_GETODELAY");
+        printf("real_delay=%d delay=%d\n", val, delay);
+    }
+#endif
+    return delay;
+}
+
+
+/* prepare a new audio buffer */
+void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
+{
+    VideoState *is = opaque;
+    int audio_size, len1;
+    double pts;
+
+    audio_callback_time = av_gettime();
+    
+    while (len > 0) {
+        if (is->audio_buf_index >= is->audio_buf_size) {
+           audio_size = audio_decode_frame(is, is->audio_buf, &pts);
+           if (audio_size < 0) {
+                /* if error, just output silence */
+               is->audio_buf_size = 1024;
+               memset(is->audio_buf, 0, is->audio_buf_size);
+           } else {
+               if (is->show_audio)
+                   update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
+               audio_size = synchronize_audio(is, (int16_t *)is->audio_buf, audio_size, 
+                                              pts);
+               is->audio_buf_size = audio_size;
+           }
+           is->audio_buf_index = 0;
+        }
+        len1 = is->audio_buf_size - is->audio_buf_index;
+        if (len1 > len)
+            len1 = len;
+        memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
+        len -= len1;
+        stream += len1;
+        is->audio_buf_index += len1;
+    }
+}
+
+
+/* open a given stream. Return 0 if OK */
+static int stream_component_open(VideoState *is, int stream_index)
+{
+    AVFormatContext *ic = is->ic;
+    AVCodecContext *enc;
+    AVCodec *codec;
+    SDL_AudioSpec wanted_spec, spec;
+
+    if (stream_index < 0 || stream_index >= ic->nb_streams)
+        return -1;
+    enc = &ic->streams[stream_index]->codec;
+    
+
+    /* prepare audio output */
+    if (enc->codec_type == CODEC_TYPE_AUDIO) {
+        wanted_spec.freq = enc->sample_rate;
+        wanted_spec.format = AUDIO_S16SYS;
+        wanted_spec.channels = enc->channels;
+        wanted_spec.silence = 0;
+        wanted_spec.samples = 8192;
+        wanted_spec.callback = sdl_audio_callback;
+        wanted_spec.userdata = is;
+        if (SDL_OpenAudio(&wanted_spec, &spec) < 0)
+            return -1;
+        is->audio_hw_buf_size = spec.size;
+    }
+
+    codec = avcodec_find_decoder(enc->codec_id);
+    if (!codec ||
+        avcodec_open(enc, codec) < 0)
+        return -1;
+        switch(enc->codec_type) {
+    case CODEC_TYPE_AUDIO:
+        is->audio_stream = stream_index;
+        is->audio_st = ic->streams[stream_index];
+        is->audio_buf_size = 0;
+        is->audio_buf_index = 0;
+        is->audio_pkt_size = 0;
+        memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
+        packet_queue_init(&is->audioq);
+	SDL_PauseAudio(0);
+        break;
+    case CODEC_TYPE_VIDEO:
+        is->video_stream = stream_index;
+        is->video_st = ic->streams[stream_index];
+
+        packet_queue_init(&is->videoq);
+        is->video_tid = SDL_CreateThread(video_thread, is);
+        break;
+    default:
+        break;
+    }
+    return 0;
+}
+
+static void stream_component_close(VideoState *is, int stream_index)
+{
+    AVFormatContext *ic = is->ic;
+    AVCodecContext *enc;
+    
+    enc = &ic->streams[stream_index]->codec;
+
+    switch(enc->codec_type) {
+    case CODEC_TYPE_AUDIO:
+        packet_queue_abort(&is->audioq);
+
+        SDL_CloseAudio();
+
+        packet_queue_end(&is->audioq);
+        break;
+    case CODEC_TYPE_VIDEO:
+        packet_queue_abort(&is->videoq);
+
+        /* note: we also signal this mutex to make sure we deblock the
+           video thread in all cases */
+        SDL_LockMutex(is->pictq_mutex);
+        SDL_CondSignal(is->pictq_cond);
+        SDL_UnlockMutex(is->pictq_mutex);
+
+        SDL_WaitThread(is->video_tid, NULL);
+
+        packet_queue_end(&is->videoq);
+        break;
+    default:
+        break;
+    }
+
+    avcodec_close(enc);
+    switch(enc->codec_type) {
+    case CODEC_TYPE_AUDIO:
+        is->audio_st = NULL;
+        is->audio_stream = -1;
+        break;
+    case CODEC_TYPE_VIDEO:
+        is->video_st = NULL;
+        is->video_stream = -1;
+        break;
+    default:
+        break;
+    }
+}
+
+
+/* this thread gets the stream from the disk or the network */
+static int decode_thread(void *arg)
+{
+    VideoState *is = arg;
+    AVFormatContext *ic;
+    int err, i, ret, video_index, audio_index;
+    AVPacket pkt1, *pkt = &pkt1;
+
+    video_index = -1;
+    audio_index = -1;
+    is->video_stream = -1;
+    is->audio_stream = -1;
+
+    err = av_open_input_file(&ic, is->filename, NULL, 0, NULL);
+    if (err < 0)
+        return 0;
+    is->ic = ic;
+    err = av_find_stream_info(ic);
+    if (err < 0)
+        goto fail;
+
+    for(i = 0; i < ic->nb_streams; i++) {
+        AVCodecContext *enc = &ic->streams[i]->codec;
+        switch(enc->codec_type) {
+        case CODEC_TYPE_AUDIO:
+            if (audio_index < 0 && !audio_disable)
+                audio_index = i;
+            break;
+        case CODEC_TYPE_VIDEO:
+            if (video_index < 0 && !video_disable)
+                video_index = i;
+            break;
+        default:
+            break;
+        }
+    }
+    if (show_status) {
+        dump_format(ic, 0, is->filename, 0);
+    }
+
+    /* open the streams */
+    if (audio_index >= 0) {
+        stream_component_open(is, audio_index);
+    }
+
+    if (video_index >= 0) {
+        stream_component_open(is, video_index);
+    } else {
+        if (!display_disable)
+            is->show_audio = 1;
+    }
+
+    if (is->video_stream < 0 && is->audio_stream < 0) {
+        goto fail;
+    }
+
+    for(;;) {
+        if (is->abort_request)
+            break;
+        /* if the queue are full, no need to read more */
+        if (is->audioq.size > MAX_AUDIOQ_SIZE ||
+            is->videoq.size > MAX_VIDEOQ_SIZE) {
+            /* wait 10 ms */
+            SDL_Delay(10);
+            continue;
+        }
+        ret = av_read_packet(ic, pkt);
+        if (ret < 0) {
+            break;
+        }
+        if (pkt->stream_index == is->audio_stream) {
+            packet_queue_put(&is->audioq, pkt);
+        } else if (pkt->stream_index == is->video_stream) {
+            packet_queue_put(&is->videoq, pkt);
+        } else {
+            av_free_packet(pkt);
+        }
+    }
+    /* wait until the end */
+    while (!is->abort_request) {
+        SDL_Delay(100);
+    }
+
+ fail:
+    /* close each stream */
+    if (is->audio_stream >= 0)
+        stream_component_close(is, is->audio_stream);
+    if (is->video_stream >= 0)
+        stream_component_close(is, is->video_stream);
+
+    av_close_input_file(is->ic);
+    is->ic = NULL; /* safety */
+    return 0;
+}
+
+/* pause or resume the video */
+static void stream_pause(VideoState *is)
+{
+    is->paused = !is->paused;
+}
+
+static VideoState *stream_open(const char *filename)
+{
+    VideoState *is;
+
+    is = av_mallocz(sizeof(VideoState));
+    if (!is)
+        return NULL;
+    pstrcpy(is->filename, sizeof(is->filename), filename);
+    if (screen) {
+        is->width = screen->w;
+        is->height = screen->h;
+    }
+    is->ytop = 0;
+    is->xleft = 0;
+
+    /* start video display */
+    is->pictq_mutex = SDL_CreateMutex();
+    is->pictq_cond = SDL_CreateCond();
+
+    /* add the refresh timer to draw the picture */
+    schedule_refresh(is, 40);
+
+    is->av_sync_type = AV_SYNC_AUDIO_MASTER;
+
+    is->parse_tid = SDL_CreateThread(decode_thread, is);
+    if (!is->parse_tid) {
+        av_free(is);
+        return NULL;
+    }
+    return is;
+}
+
+static void stream_close(VideoState *is)
+{
+    VideoPicture *vp;
+    int i;
+    /* XXX: use a special url_shutdown call to abort parse cleanly */
+    is->abort_request = 1;
+    SDL_WaitThread(is->parse_tid, NULL);
+
+    /* free all pictures */
+    for(i=0;i<VIDEO_PICTURE_QUEUE_SIZE; i++) {
+        vp = &is->pictq[i];
+        if (vp->bmp) {
+            SDL_FreeYUVOverlay(vp->bmp);
+            vp->bmp = NULL;
+        }
+    }
+    SDL_DestroyMutex(is->pictq_mutex);
+    SDL_DestroyCond(is->pictq_cond);
+}
+
+void toggle_full_screen(void)
+{
+    int w, h, flags;
+    is_full_screen = !is_full_screen;
+    if (!fs_screen_width) {
+        /* use default SDL method */
+        SDL_WM_ToggleFullScreen(screen);
+    } else {
+        /* use the recorded resolution */
+        flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
+        if (is_full_screen) {
+            w = fs_screen_width;
+            h = fs_screen_height;
+            flags |= SDL_FULLSCREEN;
+        } else {
+            w = screen_width;
+            h = screen_height;
+            flags |= SDL_RESIZABLE;
+        }
+        screen = SDL_SetVideoMode(w, h, 0, flags);
+        cur_stream->width = w;
+        cur_stream->height = h;
+    }
+}
+
+void toggle_pause(void)
+{
+    if (cur_stream)
+        stream_pause(cur_stream);
+}
+
+void do_exit(void)
+{
+    if (cur_stream) {
+        stream_close(cur_stream);
+        cur_stream = NULL;
+    }
+    if (show_status)
+        printf("\n");
+    SDL_Quit();
+    exit(0);
+}
+
+void toggle_audio_display(void)
+{
+    if (cur_stream) {
+        cur_stream->show_audio = !cur_stream->show_audio;
+    }
+}
+
+/* handle an event sent by the GUI */
+void event_loop(void)
+{
+    SDL_Event event;
+
+    for(;;) {
+        SDL_WaitEvent(&event);
+        switch(event.type) {
+        case SDL_KEYDOWN:
+            switch(event.key.keysym.sym) {
+            case SDLK_ESCAPE:
+            case SDLK_q:
+                do_exit();
+                break;
+            case SDLK_f:
+                toggle_full_screen();
+                break;
+            case SDLK_p:
+            case SDLK_SPACE:
+                toggle_pause();
+                break;
+            case SDLK_a:
+                toggle_audio_display();
+                break;
+            default:
+                break;
+            }
+            break;
+        case SDL_VIDEORESIZE:
+            if (cur_stream) {
+                screen = SDL_SetVideoMode(event.resize.w, event.resize.h, 0, 
+                                          SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
+                cur_stream->width = event.resize.w;
+                cur_stream->height = event.resize.h;
+            }
+            break;
+        case SDL_QUIT:
+            do_exit();
+            break;
+        case FF_ALLOC_EVENT:
+            alloc_picture(event.user.data1);
+            break;
+        case FF_REFRESH_EVENT:
+            video_refresh_timer(event.user.data1);
+            break;
+        default:
+            break;
+        }
+    }
+}
+
+void opt_width(const char *arg)
+{
+    screen_width = atoi(arg);
+}
+
+void opt_height(const char *arg)
+{
+    screen_height = atoi(arg);
+}
+
+static void opt_format(const char *arg)
+{
+    file_iformat = av_find_input_format(arg);
+    if (!file_iformat) {
+        fprintf(stderr, "Unknown input format: %s\n", arg);
+        exit(1);
+    }
+}
+
+const OptionDef options[] = {
+    { "h", 0, {(void*)show_help}, "show help" },
+    { "x", HAS_ARG, {(void*)opt_width}, "force displayed width", "width" },
+    { "y", HAS_ARG, {(void*)opt_height}, "force displayed height", "height" },
+    { "an", OPT_BOOL, {(void*)&audio_disable}, "disable audio" },
+    { "vn", OPT_BOOL, {(void*)&video_disable}, "disable video" },
+    { "nodisp", OPT_BOOL, {(void*)&display_disable}, "disable graphical display" },
+    { "f", HAS_ARG, {(void*)opt_format}, "force format", "fmt" },
+    { "stats", OPT_BOOL | OPT_EXPERT, {(void*)&show_status}, "show status", "" },
+    { NULL, },
+};
+
+void show_help(void)
+{
+    printf("usage: ffplay [options] input_file\n"
+           "Simple media player\n");
+    printf("\n");
+    show_help_options(options);
+    printf("\nWhile playing:\n"
+           "q, ESC              quit\n"
+           "f                   toggle full screen\n"
+           "p, SPC              pause\n"
+           "a                   show audio waves\n"
+           );
+    exit(1);
+}
+
+void parse_arg_file(const char *filename)
+{
+    input_filename = filename;
+}
+
+/* Called from the main */
+int main(int argc, char **argv)
+{
+    int flags;
+    
+    /* register all codecs, demux and protocols */
+    av_register_all();
+
+    parse_options(argc, argv, options);
+
+    if (!input_filename)
+        show_help();
+
+    if (display_disable) {
+        video_disable = 1;
+    }
+    flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER | SDL_INIT_EVENTTHREAD;
+    if (SDL_Init (flags)) {
+        fprintf(stderr, "Could not initialize SDL - exiting\n");
+        exit(1);
+    }
+
+    if (!display_disable) {
+        screen = SDL_SetVideoMode(screen_width, screen_height, 0, 
+                                  SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
+        if (!screen) {
+            fprintf(stderr, "SDL: could not set video mode - exiting\n");
+            exit(1);
+        }
+        SDL_WM_SetCaption("FFplay", "FFplay");
+#ifdef HAVE_X11
+        /* save the screen resolution... SDL should allow full screen
+           by resizing the window */
+        {
+            Display *dpy;
+            dpy = XOpenDisplay(NULL);
+            if (dpy) {
+                fs_screen_width = DisplayWidth(dpy, DefaultScreen(dpy));
+                fs_screen_height = DisplayHeight(dpy, DefaultScreen(dpy));
+		XCloseDisplay(dpy);
+            }
+        }
+#endif
+    }
+
+    SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
+    SDL_EventState(SDL_MOUSEMOTION, SDL_IGNORE);
+    SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
+    SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
+
+    cur_stream = stream_open(input_filename);
+
+    event_loop();
+
+    /* never returns */
+
+    return 0;
+}