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-rw-r--r--libavformat/libnut.c324
1 files changed, 324 insertions, 0 deletions
diff --git a/libavformat/libnut.c b/libavformat/libnut.c
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--- /dev/null
+++ b/libavformat/libnut.c
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+/*
+ * NUT (de)muxing via libnut
+ * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * NUT demuxing and muxing via libnut.
+ * @author Oded Shimon <ods15@ods15.dyndns.org>
+ */
+
+#include "avformat.h"
+#include "internal.h"
+#include "riff.h"
+#include <libnut.h>
+
+#define ID_STRING "nut/multimedia container"
+#define ID_LENGTH (strlen(ID_STRING) + 1)
+
+typedef struct {
+ nut_context_tt * nut;
+ nut_stream_header_tt * s;
+} NUTContext;
+
+static const AVCodecTag nut_tags[] = {
+ { AV_CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
+ { AV_CODEC_ID_MP3, MKTAG('m', 'p', '3', ' ') },
+ { AV_CODEC_ID_VORBIS, MKTAG('v', 'r', 'b', 's') },
+ { 0, 0 },
+};
+
+#if CONFIG_LIBNUT_MUXER
+static int av_write(void * h, size_t len, const uint8_t * buf) {
+ AVIOContext * bc = h;
+ avio_write(bc, buf, len);
+ //avio_flush(bc);
+ return len;
+}
+
+static int nut_write_header(AVFormatContext * avf) {
+ NUTContext * priv = avf->priv_data;
+ AVIOContext * bc = avf->pb;
+ nut_muxer_opts_tt mopts = {
+ .output = {
+ .priv = bc,
+ .write = av_write,
+ },
+ .alloc = { av_malloc, av_realloc, av_free },
+ .write_index = 1,
+ .realtime_stream = 0,
+ .max_distance = 32768,
+ .fti = NULL,
+ };
+ nut_stream_header_tt * s;
+ int i;
+
+ priv->s = s = av_mallocz_array(avf->nb_streams + 1, sizeof*s);
+ if(!s)
+ return AVERROR(ENOMEM);
+
+ for (i = 0; i < avf->nb_streams; i++) {
+ AVCodecContext * codec = avf->streams[i]->codec;
+ int j;
+ int fourcc = 0;
+ int num, denom, ssize;
+
+ s[i].type = codec->codec_type == AVMEDIA_TYPE_VIDEO ? NUT_VIDEO_CLASS : NUT_AUDIO_CLASS;
+
+ if (codec->codec_tag) fourcc = codec->codec_tag;
+ else fourcc = ff_codec_get_tag(nut_tags, codec->codec_id);
+
+ if (!fourcc) {
+ if (codec->codec_type == AVMEDIA_TYPE_VIDEO) fourcc = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id);
+ if (codec->codec_type == AVMEDIA_TYPE_AUDIO) fourcc = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
+ }
+
+ s[i].fourcc_len = 4;
+ s[i].fourcc = av_malloc(s[i].fourcc_len);
+ for (j = 0; j < s[i].fourcc_len; j++) s[i].fourcc[j] = (fourcc >> (j*8)) & 0xFF;
+
+ ff_parse_specific_params(codec, &num, &ssize, &denom);
+ avpriv_set_pts_info(avf->streams[i], 60, denom, num);
+
+ s[i].time_base.num = denom;
+ s[i].time_base.den = num;
+
+ s[i].fixed_fps = 0;
+ s[i].decode_delay = codec->has_b_frames;
+ s[i].codec_specific_len = codec->extradata_size;
+ s[i].codec_specific = codec->extradata;
+
+ if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ s[i].width = codec->width;
+ s[i].height = codec->height;
+ s[i].sample_width = 0;
+ s[i].sample_height = 0;
+ s[i].colorspace_type = 0;
+ } else {
+ s[i].samplerate_num = codec->sample_rate;
+ s[i].samplerate_denom = 1;
+ s[i].channel_count = codec->channels;
+ }
+ }
+
+ s[avf->nb_streams].type = -1;
+ priv->nut = nut_muxer_init(&mopts, s, NULL);
+
+ return 0;
+}
+
+static int nut_write_packet(AVFormatContext * avf, AVPacket * pkt) {
+ NUTContext * priv = avf->priv_data;
+ nut_packet_tt p;
+
+ p.len = pkt->size;
+ p.stream = pkt->stream_index;
+ p.pts = pkt->pts;
+ p.flags = pkt->flags & AV_PKT_FLAG_KEY ? NUT_FLAG_KEY : 0;
+ p.next_pts = 0;
+
+ nut_write_frame_reorder(priv->nut, &p, pkt->data);
+
+ return 0;
+}
+
+static int nut_write_trailer(AVFormatContext * avf) {
+ AVIOContext * bc = avf->pb;
+ NUTContext * priv = avf->priv_data;
+ int i;
+
+ nut_muxer_uninit_reorder(priv->nut);
+ avio_flush(bc);
+
+ for(i = 0; priv->s[i].type != -1; i++ ) av_freep(&priv->s[i].fourcc);
+ av_freep(&priv->s);
+
+ return 0;
+}
+
+AVOutputFormat ff_libnut_muxer = {
+ .name = "libnut",
+ .long_name = "nut format",
+ .mime_type = "video/x-nut",
+ .extensions = "nut",
+ .priv_data_size = sizeof(NUTContext),
+ .audio_codec = AV_CODEC_ID_VORBIS,
+ .video_codec = AV_CODEC_ID_MPEG4,
+ .write_header = nut_write_header,
+ .write_packet = nut_write_packet,
+ .write_trailer = nut_write_trailer,
+ .flags = AVFMT_GLOBALHEADER,
+};
+#endif /* CONFIG_LIBNUT_MUXER */
+
+static int nut_probe(AVProbeData *p) {
+ if (!memcmp(p->buf, ID_STRING, ID_LENGTH)) return AVPROBE_SCORE_MAX;
+
+ return 0;
+}
+
+static size_t av_read(void * h, size_t len, uint8_t * buf) {
+ AVIOContext * bc = h;
+ return avio_read(bc, buf, len);
+}
+
+static off_t av_seek(void * h, long long pos, int whence) {
+ AVIOContext * bc = h;
+ if (whence == SEEK_END) {
+ pos = avio_size(bc) + pos;
+ whence = SEEK_SET;
+ }
+ return avio_seek(bc, pos, whence);
+}
+
+static int nut_read_header(AVFormatContext * avf) {
+ NUTContext * priv = avf->priv_data;
+ AVIOContext * bc = avf->pb;
+ nut_demuxer_opts_tt dopts = {
+ .input = {
+ .priv = bc,
+ .seek = av_seek,
+ .read = av_read,
+ .eof = NULL,
+ .file_pos = 0,
+ },
+ .alloc = { av_malloc, av_realloc, av_free },
+ .read_index = 1,
+ .cache_syncpoints = 1,
+ };
+ nut_context_tt * nut = priv->nut = nut_demuxer_init(&dopts);
+ nut_stream_header_tt * s;
+ int ret, i;
+
+ if(!nut)
+ return -1;
+
+ if ((ret = nut_read_headers(nut, &s, NULL))) {
+ av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(ret));
+ nut_demuxer_uninit(nut);
+ priv->nut = NULL;
+ return -1;
+ }
+
+ priv->s = s;
+
+ for (i = 0; s[i].type != -1 && i < 2; i++) {
+ AVStream * st = avformat_new_stream(avf, NULL);
+ int j;
+
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ for (j = 0; j < s[i].fourcc_len && j < 8; j++) st->codec->codec_tag |= s[i].fourcc[j]<<(j*8);
+
+ st->codec->has_b_frames = s[i].decode_delay;
+
+ st->codec->extradata_size = s[i].codec_specific_len;
+ if (st->codec->extradata_size) {
+ if(ff_alloc_extradata(st->codec, st->codec->extradata_size)){
+ nut_demuxer_uninit(nut);
+ priv->nut = NULL;
+ return AVERROR(ENOMEM);
+ }
+ memcpy(st->codec->extradata, s[i].codec_specific, st->codec->extradata_size);
+ }
+
+ avpriv_set_pts_info(avf->streams[i], 60, s[i].time_base.num, s[i].time_base.den);
+ st->start_time = 0;
+ st->duration = s[i].max_pts;
+
+ st->codec->codec_id = ff_codec_get_id(nut_tags, st->codec->codec_tag);
+
+ switch(s[i].type) {
+ case NUT_AUDIO_CLASS:
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ if (st->codec->codec_id == AV_CODEC_ID_NONE) st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, st->codec->codec_tag);
+
+ st->codec->channels = s[i].channel_count;
+ st->codec->sample_rate = s[i].samplerate_num / s[i].samplerate_denom;
+ break;
+ case NUT_VIDEO_CLASS:
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ if (st->codec->codec_id == AV_CODEC_ID_NONE) st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag);
+
+ st->codec->width = s[i].width;
+ st->codec->height = s[i].height;
+ st->sample_aspect_ratio.num = s[i].sample_width;
+ st->sample_aspect_ratio.den = s[i].sample_height;
+ break;
+ }
+ if (st->codec->codec_id == AV_CODEC_ID_NONE) av_log(avf, AV_LOG_ERROR, "Unknown codec?!\n");
+ }
+
+ return 0;
+}
+
+static int nut_read_packet(AVFormatContext * avf, AVPacket * pkt) {
+ NUTContext * priv = avf->priv_data;
+ nut_packet_tt pd;
+ int ret;
+
+ ret = nut_read_next_packet(priv->nut, &pd);
+
+ if (ret || av_new_packet(pkt, pd.len) < 0) {
+ if (ret != NUT_ERR_EOF)
+ av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(ret));
+ return -1;
+ }
+
+ if (pd.flags & NUT_FLAG_KEY) pkt->flags |= AV_PKT_FLAG_KEY;
+ pkt->pts = pd.pts;
+ pkt->stream_index = pd.stream;
+ pkt->pos = avio_tell(avf->pb);
+
+ ret = nut_read_frame(priv->nut, &pd.len, pkt->data);
+
+ return ret;
+}
+
+static int nut_read_seek(AVFormatContext * avf, int stream_index, int64_t target_ts, int flags) {
+ NUTContext * priv = avf->priv_data;
+ int active_streams[] = { stream_index, -1 };
+ double time_pos = target_ts * priv->s[stream_index].time_base.num / (double)priv->s[stream_index].time_base.den;
+
+ if (nut_seek(priv->nut, time_pos, 2*!(flags & AVSEEK_FLAG_BACKWARD), active_streams)) return -1;
+
+ return 0;
+}
+
+static int nut_read_close(AVFormatContext *s) {
+ NUTContext * priv = s->priv_data;
+
+ nut_demuxer_uninit(priv->nut);
+
+ return 0;
+}
+
+AVInputFormat ff_libnut_demuxer = {
+ .name = "libnut",
+ .long_name = NULL_IF_CONFIG_SMALL("NUT format"),
+ .priv_data_size = sizeof(NUTContext),
+ .read_probe = nut_probe,
+ .read_header = nut_read_header,
+ .read_packet = nut_read_packet,
+ .read_close = nut_read_close,
+ .read_seek = nut_read_seek,
+ .extensions = "nut",
+};
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