diff options
Diffstat (limited to 'libavformat/jpeg.c')
-rw-r--r-- | libavformat/jpeg.c | 377 |
1 files changed, 158 insertions, 219 deletions
diff --git a/libavformat/jpeg.c b/libavformat/jpeg.c index e86edfe..38a955b 100644 --- a/libavformat/jpeg.c +++ b/libavformat/jpeg.c @@ -1,6 +1,6 @@ /* - * JPEG based formats - * Copyright (c) 2000, 2001 Fabrice Bellard. + * JPEG image format + * 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 @@ -18,251 +18,190 @@ */ #include "avformat.h" -/* Multipart JPEG */ - -#define BOUNDARY_TAG "ffserver" - -static int mpjpeg_write_header(AVFormatContext *s) -{ - UINT8 buf1[256]; - - snprintf(buf1, sizeof(buf1), "--%s\n", BOUNDARY_TAG); - put_buffer(&s->pb, buf1, strlen(buf1)); - put_flush_packet(&s->pb); - return 0; -} - -static int mpjpeg_write_packet(AVFormatContext *s, int stream_index, - UINT8 *buf, int size, int force_pts) -{ - UINT8 buf1[256]; - - snprintf(buf1, sizeof(buf1), "Content-type: image/jpeg\n\n"); - put_buffer(&s->pb, buf1, strlen(buf1)); - put_buffer(&s->pb, buf, size); - - snprintf(buf1, sizeof(buf1), "\n--%s\n", BOUNDARY_TAG); - put_buffer(&s->pb, buf1, strlen(buf1)); - put_flush_packet(&s->pb); - return 0; -} - -static int mpjpeg_write_trailer(AVFormatContext *s) -{ - return 0; -} - -static AVOutputFormat mpjpeg_format = { - "mpjpeg", - "Mime multipart JPEG format", - "multipart/x-mixed-replace;boundary=" BOUNDARY_TAG, - "mjpg", - 0, - CODEC_ID_NONE, - CODEC_ID_MJPEG, - mpjpeg_write_header, - mpjpeg_write_packet, - mpjpeg_write_trailer, -}; - - -/*************************************/ -/* single frame JPEG */ - -static int single_jpeg_write_header(AVFormatContext *s) -{ - return 0; -} - -static int single_jpeg_write_packet(AVFormatContext *s, int stream_index, - UINT8 *buf, int size, int force_pts) -{ - put_buffer(&s->pb, buf, size); - put_flush_packet(&s->pb); - return 1; /* no more data can be sent */ -} - -static int single_jpeg_write_trailer(AVFormatContext *s) +static int jpeg_probe(AVProbeData *pd) { - return 0; + if (pd->buf_size >= 64 && + pd->buf[0] == 0xff && pd->buf[1] == 0xd8 && pd->buf[2] == 0xff) + return AVPROBE_SCORE_MAX; + else + return 0; } -static AVOutputFormat single_jpeg_format = { - "singlejpeg", - "single JPEG image", - "image/jpeg", - NULL, /* note: no extension to favorize jpeg multiple images match */ - 0, - CODEC_ID_NONE, - CODEC_ID_MJPEG, - single_jpeg_write_header, - single_jpeg_write_packet, - single_jpeg_write_trailer, -}; - -/*************************************/ -/* multiple jpeg images */ - -typedef struct JpegContext { - char path[1024]; - int img_number; -} JpegContext; +typedef struct JpegOpaque { + int (*alloc_cb)(void *opaque, AVImageInfo *info); + void *opaque; + int ret_code; +} JpegOpaque; -static int jpeg_write_header(AVFormatContext *s1) +/* called by the codec to allocate the image */ +static int jpeg_get_buffer(AVCodecContext *c, AVFrame *picture) { - JpegContext *s; - - s = av_mallocz(sizeof(JpegContext)); - if (!s) + JpegOpaque *jctx = c->opaque; + AVImageInfo info1, *info = &info1; + int ret, i; + + info->width = c->width; + info->height = c->height; + info->pix_fmt = c->pix_fmt; + ret = jctx->alloc_cb(jctx->opaque, info); + if (ret) { + jctx->ret_code = ret; return -1; - s1->priv_data = s; - pstrcpy(s->path, sizeof(s->path), s1->filename); - s->img_number = 1; - return 0; -} - -static int jpeg_write_packet(AVFormatContext *s1, int stream_index, - UINT8 *buf, int size, int force_pts) -{ - JpegContext *s = s1->priv_data; - char filename[1024]; - ByteIOContext f1, *pb = &f1; - - if (get_frame_filename(filename, sizeof(filename), - s->path, s->img_number) < 0) - return -EIO; - if (url_fopen(pb, filename, URL_WRONLY) < 0) - return -EIO; - - put_buffer(pb, buf, size); - put_flush_packet(pb); - - url_fclose(pb); - s->img_number++; - - return 0; + } else { + for(i=0;i<3;i++) { + picture->data[i] = info->pict.data[i]; + picture->linesize[i] = info->pict.linesize[i]; + } + return 0; + } } -static int jpeg_write_trailer(AVFormatContext *s1) +static void img_copy(UINT8 *dst, int dst_wrap, + UINT8 *src, int src_wrap, + int width, int height) { - return 0; + for(;height > 0; height--) { + memcpy(dst, src, width); + dst += dst_wrap; + src += src_wrap; + } } -/***/ +/* XXX: libavcodec is broken for truncated jpegs! */ +#define IO_BUF_SIZE (1024*1024) -static int jpeg_read_header(AVFormatContext *s1, AVFormatParameters *ap) +static int jpeg_read(ByteIOContext *f, + int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque) { - JpegContext *s; - int i; - char buf[1024]; - ByteIOContext pb1, *f = &pb1; - AVStream *st; - - s = av_mallocz(sizeof(JpegContext)); - if (!s) + AVCodecContext *c; + AVFrame *picture, picture1; + int len, size, got_picture, i; + uint8_t *inbuf_ptr, inbuf[IO_BUF_SIZE]; + JpegOpaque jctx; + + jctx.alloc_cb = alloc_cb; + jctx.opaque = opaque; + jctx.ret_code = -1; /* default return code is error */ + + c = avcodec_alloc_context(); + if (!c) + return -1; + picture= avcodec_alloc_frame(); + if (!picture) { + av_free(c); return -1; - s1->priv_data = s; - pstrcpy(s->path, sizeof(s->path), s1->filename); - - s1->nb_streams = 1; - st = av_mallocz(sizeof(AVStream)); - if (!st) { - av_free(s); - return -ENOMEM; } - avcodec_get_context_defaults(&st->codec); - - s1->streams[0] = st; - s->img_number = 0; - - /* try to find the first image */ - for(i=0;i<5;i++) { - if (get_frame_filename(buf, sizeof(buf), s->path, s->img_number) < 0) - goto fail; - if (url_fopen(f, buf, URL_RDONLY) >= 0) + c->opaque = &jctx; + c->get_buffer = jpeg_get_buffer; + c->flags |= CODEC_FLAG_TRUNCATED; /* we dont send complete frames */ + if (avcodec_open(c, &mjpeg_decoder) < 0) + goto fail1; + for(;;) { + size = get_buffer(f, inbuf, sizeof(inbuf)); + if (size == 0) break; - s->img_number++; + inbuf_ptr = inbuf; + while (size > 0) { + len = avcodec_decode_video(c, &picture1, &got_picture, + inbuf_ptr, size); + if (len < 0) + goto fail; + if (got_picture) + goto the_end; + size -= len; + inbuf_ptr += len; + } } - if (i == 5) + the_end: + /* XXX: currently, the mjpeg decoder does not use AVFrame, so we + must do it by hand */ + if (jpeg_get_buffer(c, picture) < 0) goto fail; - url_fclose(f); - st->codec.codec_type = CODEC_TYPE_VIDEO; - st->codec.codec_id = CODEC_ID_MJPEG; - - if (!ap || !ap->frame_rate) - st->codec.frame_rate = 25 * FRAME_RATE_BASE; - else - st->codec.frame_rate = ap->frame_rate; - return 0; + for(i=0;i<3;i++) { + int w, h; + w = c->width; + h = c->height; + if (i >= 1) { + switch(c->pix_fmt) { + default: + case PIX_FMT_YUV420P: + w >>= 1; + h >>= 1; + break; + case PIX_FMT_YUV422P: + w >>= 1; + break; + case PIX_FMT_YUV444P: + break; + } + } + img_copy(picture->data[i], picture->linesize[i], + picture1.data[i], picture1.linesize[i], + w, h); + } + jctx.ret_code = 0; fail: - av_free(s); - return -EIO; + avcodec_close(c); + fail1: + av_free(picture); + av_free(c); + return jctx.ret_code; } -static int jpeg_read_packet(AVFormatContext *s1, AVPacket *pkt) +static int jpeg_write(ByteIOContext *pb, AVImageInfo *info) { - JpegContext *s = s1->priv_data; - char filename[1024]; - int size; - ByteIOContext f1, *f = &f1; - - if (get_frame_filename(filename, sizeof(filename), - s->path, s->img_number) < 0) - return -EIO; + AVCodecContext *c; + uint8_t *outbuf = NULL; + int outbuf_size, ret, size, i; + AVFrame *picture; + + ret = -1; + c = avcodec_alloc_context(); + if (!c) + return -1; + picture = avcodec_alloc_frame(); + if (!picture) + goto fail2; + c->width = info->width; + c->height = info->height; + c->pix_fmt = info->pix_fmt; + for(i=0;i<3;i++) { + picture->data[i] = info->pict.data[i]; + picture->linesize[i] = info->pict.linesize[i]; + } + /* set the quality */ + picture->quality = 3; /* XXX: a parameter should be used */ + c->flags |= CODEC_FLAG_QSCALE; - f = &f1; - if (url_fopen(f, filename, URL_RDONLY) < 0) - return -EIO; + if (avcodec_open(c, &mjpeg_encoder) < 0) + goto fail1; - size = url_seek(url_fileno(f), 0, SEEK_END); - url_seek(url_fileno(f), 0, SEEK_SET); - - av_new_packet(pkt, size); - pkt->stream_index = 0; - get_buffer(f, pkt->data, size); + /* XXX: needs to sort out that size problem */ + outbuf_size = 1000000; + outbuf = av_malloc(outbuf_size); - url_fclose(f); - s->img_number++; - return 0; -} + size = avcodec_encode_video(c, outbuf, outbuf_size, picture); + if (size < 0) + goto fail; + put_buffer(pb, outbuf, size); + put_flush_packet(pb); + ret = 0; -static int jpeg_read_close(AVFormatContext *s1) -{ - return 0; + fail: + avcodec_close(c); + av_free(outbuf); + fail1: + av_free(picture); + fail2: + av_free(c); + return ret; } -static AVInputFormat jpeg_iformat = { - "jpeg", - "JPEG image", - sizeof(JpegContext), - NULL, - jpeg_read_header, - jpeg_read_packet, - jpeg_read_close, - NULL, - .flags = AVFMT_NOFILE | AVFMT_NEEDNUMBER, - .extensions = "jpg,jpeg", -}; - -static AVOutputFormat jpeg_oformat = { +AVImageFormat jpeg_image_format = { "jpeg", - "JPEG image", - "image/jpeg", "jpg,jpeg", - sizeof(JpegContext), - CODEC_ID_NONE, - CODEC_ID_MJPEG, - jpeg_write_header, - jpeg_write_packet, - jpeg_write_trailer, - .flags = AVFMT_NOFILE | AVFMT_NEEDNUMBER, + jpeg_probe, + jpeg_read, + (1 << PIX_FMT_YUV420P) | (1 << PIX_FMT_YUV422P) | (1 << PIX_FMT_YUV444P), + jpeg_write, }; - -int jpeg_init(void) -{ - av_register_output_format(&mpjpeg_format); - av_register_output_format(&single_jpeg_format); - av_register_input_format(&jpeg_iformat); - av_register_output_format(&jpeg_oformat); - return 0; -} |