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FFmpeg/libavformat/avienc.c
Tobias Rapp b4fbad2634 libavformat/avienc: Fix duration of audio segment in OpenDML master index 
Fixes the duration field of the OpenDML master index "indx" chunk to
contain the number of samples instead of the number of packets for
(linear/PCM) audio streams.

This matches the OpenDML V1.02 standard text which states that the
duration field shall contain "time span in stream ticks".

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-03-04 00:08:53 +01:00

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/*
* AVI muxer
* Copyright (c) 2000 Fabrice Bellard
*
* 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
*/
//#define DEBUG
#include "avformat.h"
#include "internal.h"
#include "avi.h"
#include "avio_internal.h"
#include "riff.h"
#include "mpegts.h"
#include "libavformat/avlanguage.h"
#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "libavutil/avassert.h"
#include "libavutil/timestamp.h"
#include "libavutil/pixdesc.h"
#include "libavcodec/raw.h"
/*
* TODO:
* - fill all fields if non streamed (nb_frames for example)
*/
typedef struct AVIIentry {
unsigned int flags, pos, len;
} AVIIentry;
#define AVI_INDEX_CLUSTER_SIZE 16384
typedef struct AVIIndex {
int64_t indx_start;
int64_t audio_strm_offset;
int entry;
int ents_allocated;
AVIIentry** cluster;
} AVIIndex;
typedef struct AVIContext {
int64_t riff_start, movi_list, odml_list;
int64_t frames_hdr_all;
int riff_id;
} AVIContext;
typedef struct AVIStream {
int64_t frames_hdr_strm;
int64_t audio_strm_length;
int packet_count;
int entry;
int max_size;
int sample_requested;
int64_t last_dts;
AVIIndex indexes;
} AVIStream;
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt);
static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
{
int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
return &idx->cluster[cl][id];
}
static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
const char *riff_tag, const char *list_tag)
{
AVIContext *avi = s->priv_data;
int64_t loff;
int i;
avi->riff_id++;
for (i = 0; i < s->nb_streams; i++) {
AVIStream *avist = s->streams[i]->priv_data;
avist->indexes.audio_strm_offset = avist->audio_strm_length;
avist->indexes.entry = 0;
}
avi->riff_start = ff_start_tag(pb, "RIFF");
ffio_wfourcc(pb, riff_tag);
loff = ff_start_tag(pb, "LIST");
ffio_wfourcc(pb, list_tag);
return loff;
}
static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
{
tag[0] = '0' + index / 10;
tag[1] = '0' + index % 10;
if (type == AVMEDIA_TYPE_VIDEO) {
tag[2] = 'd';
tag[3] = 'c';
} else if (type == AVMEDIA_TYPE_SUBTITLE) {
// note: this is not an official code
tag[2] = 's';
tag[3] = 'b';
} else {
tag[2] = 'w';
tag[3] = 'b';
}
tag[4] = '\0';
return tag;
}
static int avi_write_counters(AVFormatContext *s, int riff_id)
{
AVIOContext *pb = s->pb;
AVIContext *avi = s->priv_data;
int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
int64_t file_size;
AVCodecContext *stream;
file_size = avio_tell(pb);
for (n = 0; n < s->nb_streams; n++) {
AVIStream *avist = s->streams[n]->priv_data;
av_assert0(avist->frames_hdr_strm);
stream = s->streams[n]->codec;
avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
if (au_ssize == 0)
avio_wl32(pb, avist->packet_count);
else
avio_wl32(pb, avist->audio_strm_length / au_ssize);
if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
nb_frames = FFMAX(nb_frames, avist->packet_count);
}
if (riff_id == 1) {
av_assert0(avi->frames_hdr_all);
avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
avio_wl32(pb, nb_frames);
}
avio_seek(pb, file_size, SEEK_SET);
return 0;
}
static int avi_write_header(AVFormatContext *s)
{
AVIContext *avi = s->priv_data;
AVIOContext *pb = s->pb;
int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
AVCodecContext *video_enc;
AVStream *video_st = NULL;
int64_t list1, list2, strh, strf;
AVDictionaryEntry *t = NULL;
int padding;
if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
AVI_MAX_STREAM_COUNT);
return AVERROR(EINVAL);
}
for (n = 0; n < s->nb_streams; n++) {
s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
if (!s->streams[n]->priv_data)
return AVERROR(ENOMEM);
}
/* header list */
avi->riff_id = 0;
list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
/* avi header */
ffio_wfourcc(pb, "avih");
avio_wl32(pb, 14 * 4);
bitrate = 0;
video_enc = NULL;
for (n = 0; n < s->nb_streams; n++) {
AVCodecContext *codec = s->streams[n]->codec;
bitrate += codec->bit_rate;
if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
video_enc = codec;
video_st = s->streams[n];
}
}
nb_frames = 0;
// TODO: should be avg_frame_rate
if (video_st)
avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
video_st->time_base.den));
else
avio_wl32(pb, 0);
avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
avio_wl32(pb, 0); /* padding */
if (!pb->seekable)
avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
else
avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
avio_wl32(pb, nb_frames); /* nb frames, filled later */
avio_wl32(pb, 0); /* initial frame */
avio_wl32(pb, s->nb_streams); /* nb streams */
avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
if (video_enc) {
avio_wl32(pb, video_enc->width);
avio_wl32(pb, video_enc->height);
} else {
avio_wl32(pb, 0);
avio_wl32(pb, 0);
}
avio_wl32(pb, 0); /* reserved */
avio_wl32(pb, 0); /* reserved */
avio_wl32(pb, 0); /* reserved */
avio_wl32(pb, 0); /* reserved */
/* stream list */
for (i = 0; i < n; i++) {
AVStream *st = s->streams[i];
AVCodecContext *enc = st->codec;
AVIStream *avist = st->priv_data;
list2 = ff_start_tag(pb, "LIST");
ffio_wfourcc(pb, "strl");
/* stream generic header */
strh = ff_start_tag(pb, "strh");
switch (enc->codec_type) {
case AVMEDIA_TYPE_SUBTITLE:
// XSUB subtitles behave like video tracks, other subtitles
// are not (yet) supported.
if (enc->codec_id != AV_CODEC_ID_XSUB) {
av_log(s, AV_LOG_ERROR,
"Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
return AVERROR_PATCHWELCOME;
}
case AVMEDIA_TYPE_VIDEO:
ffio_wfourcc(pb, "vids");
break;
case AVMEDIA_TYPE_AUDIO:
ffio_wfourcc(pb, "auds");
break;
// case AVMEDIA_TYPE_TEXT:
// ffio_wfourcc(pb, "txts");
// break;
case AVMEDIA_TYPE_DATA:
ffio_wfourcc(pb, "dats");
break;
}
if (enc->codec_type == AVMEDIA_TYPE_VIDEO ||
enc->codec_id == AV_CODEC_ID_XSUB)
avio_wl32(pb, enc->codec_tag);
else
avio_wl32(pb, 1);
avio_wl32(pb, 0); /* flags */
avio_wl16(pb, 0); /* priority */
avio_wl16(pb, 0); /* language */
avio_wl32(pb, 0); /* initial frame */
ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
&& enc->codec_id != AV_CODEC_ID_XSUB
&& au_byterate > 1000LL*au_scale) {
au_byterate = 600;
au_scale = 1;
}
avpriv_set_pts_info(st, 64, au_scale, au_byterate);
if (enc->codec_id == AV_CODEC_ID_XSUB)
au_scale = au_byterate = 0;
avio_wl32(pb, au_scale); /* scale */
avio_wl32(pb, au_byterate); /* rate */
avio_wl32(pb, 0); /* start */
/* remember this offset to fill later */
avist->frames_hdr_strm = avio_tell(pb);
if (!pb->seekable)
/* FIXME: this may be broken, but who cares */
avio_wl32(pb, AVI_MAX_RIFF_SIZE);
else
avio_wl32(pb, 0); /* length, XXX: filled later */
/* suggested buffer size, is set to largest chunk size in avi_write_trailer */
if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
avio_wl32(pb, 1024 * 1024);
else if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
avio_wl32(pb, 12 * 1024);
else
avio_wl32(pb, 0);
avio_wl32(pb, -1); /* quality */
avio_wl32(pb, au_ssize); /* sample size */
avio_wl32(pb, 0);
avio_wl16(pb, enc->width);
avio_wl16(pb, enc->height);
ff_end_tag(pb, strh);
if (enc->codec_type != AVMEDIA_TYPE_DATA) {
int ret;
enum AVPixelFormat pix_fmt;
strf = ff_start_tag(pb, "strf");
switch (enc->codec_type) {
case AVMEDIA_TYPE_SUBTITLE:
/* XSUB subtitles behave like video tracks, other subtitles
* are not (yet) supported. */
if (enc->codec_id != AV_CODEC_ID_XSUB)
break;
case AVMEDIA_TYPE_VIDEO:
/* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
if ( !enc->codec_tag
&& enc->codec_id == AV_CODEC_ID_RAWVIDEO
&& enc->pix_fmt == AV_PIX_FMT_RGB555LE
&& enc->bits_per_coded_sample == 15)
enc->bits_per_coded_sample = 16;
ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0);
pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
enc->bits_per_coded_sample);
if ( !enc->codec_tag
&& enc->codec_id == AV_CODEC_ID_RAWVIDEO
&& enc->pix_fmt != pix_fmt
&& enc->pix_fmt != AV_PIX_FMT_NONE)
av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
av_get_pix_fmt_name(enc->pix_fmt));
break;
case AVMEDIA_TYPE_AUDIO:
if ((ret = ff_put_wav_header(pb, enc, 0)) < 0)
return ret;
break;
default:
av_log(s, AV_LOG_ERROR,
"Invalid or not supported codec type '%s' found in the input\n",
(char *)av_x_if_null(av_get_media_type_string(enc->codec_type), "?"));
return AVERROR(EINVAL);
}
ff_end_tag(pb, strf);
if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
ff_riff_write_info_tag(s->pb, "strn", t->value);
t = NULL;
}
if (enc->codec_id == AV_CODEC_ID_XSUB
&& (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
const char* langstr = av_convert_lang_to(t->value, AV_LANG_ISO639_1);
t = NULL;
if (langstr) {
char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
ff_riff_write_info_tag(s->pb, "strn", str);
av_free(str);
}
}
}
if (pb->seekable) {
unsigned char tag[5];
int j;
/* Starting to lay out AVI OpenDML master index.
* We want to make it JUNK entry for now, since we'd
* like to get away without making AVI an OpenDML one
* for compatibility reasons. */
avist->indexes.entry = avist->indexes.ents_allocated = 0;
avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
avio_wl16(pb, 4); /* wLongsPerEntry */
avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
ffio_wfourcc(pb, avi_stream2fourcc(tag, i, enc->codec_type));
/* dwChunkId */
avio_wl64(pb, 0); /* dwReserved[3] */
// avio_wl32(pb, 0); /* Must be 0. */
for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
avio_wl64(pb, 0);
ff_end_tag(pb, avist->indexes.indx_start);
}
if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&
st->sample_aspect_ratio.num > 0 &&
st->sample_aspect_ratio.den > 0) {
int vprp = ff_start_tag(pb, "vprp");
AVRational dar = av_mul_q(st->sample_aspect_ratio,
(AVRational) { enc->width,
enc->height });
int num, den;
av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
avio_wl32(pb, 0); // video format = unknown
avio_wl32(pb, 0); // video standard = unknown
// TODO: should be avg_frame_rate
avio_wl32(pb, lrintf(1.0 / av_q2d(st->time_base)));
avio_wl32(pb, enc->width);
avio_wl32(pb, enc->height);
avio_wl16(pb, den);
avio_wl16(pb, num);
avio_wl32(pb, enc->width);
avio_wl32(pb, enc->height);
avio_wl32(pb, 1); // progressive FIXME
avio_wl32(pb, enc->height);
avio_wl32(pb, enc->width);
avio_wl32(pb, enc->height);
avio_wl32(pb, enc->width);
avio_wl32(pb, 0);
avio_wl32(pb, 0);
avio_wl32(pb, 0);
avio_wl32(pb, 0);
ff_end_tag(pb, vprp);
}
ff_end_tag(pb, list2);
}
if (pb->seekable) {
/* AVI could become an OpenDML one, if it grows beyond 2Gb range */
avi->odml_list = ff_start_tag(pb, "JUNK");
ffio_wfourcc(pb, "odml");
ffio_wfourcc(pb, "dmlh");
avio_wl32(pb, 248);
for (i = 0; i < 248; i += 4)
avio_wl32(pb, 0);
ff_end_tag(pb, avi->odml_list);
}
ff_end_tag(pb, list1);
ff_riff_write_info(s);
padding = s->metadata_header_padding;
if (padding < 0)
padding = 1016;
/* some padding for easier tag editing */
if (padding) {
list2 = ff_start_tag(pb, "JUNK");
for (i = padding; i > 0; i -= 4)
avio_wl32(pb, 0);
ff_end_tag(pb, list2);
}
avi->movi_list = ff_start_tag(pb, "LIST");
ffio_wfourcc(pb, "movi");
avio_flush(pb);
return 0;
}
static int avi_write_ix(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
AVIContext *avi = s->priv_data;
char tag[5];
char ix_tag[] = "ix00";
int i, j;
av_assert0(pb->seekable);
if (avi->riff_id > AVI_MASTER_INDEX_SIZE) {
av_log(s, AV_LOG_ERROR, "Invalid riff index %d > %d\n",
avi->riff_id, AVI_MASTER_INDEX_SIZE);
return AVERROR(EINVAL);
}
for (i = 0; i < s->nb_streams; i++) {
AVIStream *avist = s->streams[i]->priv_data;
int64_t ix, pos;
int au_byterate, au_ssize, au_scale;
avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type);
ix_tag[3] = '0' + i;
/* Writing AVI OpenDML leaf index chunk */
ix = avio_tell(pb);
ffio_wfourcc(pb, ix_tag); /* ix?? */
avio_wl32(pb, avist->indexes.entry * 8 + 24);
/* chunk size */
avio_wl16(pb, 2); /* wLongsPerEntry */
avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
avio_wl32(pb, avist->indexes.entry);
/* nEntriesInUse */
ffio_wfourcc(pb, tag); /* dwChunkId */
avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
for (j = 0; j < avist->indexes.entry; j++) {
AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
avio_wl32(pb, ie->pos + 8);
avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
(ie->flags & 0x10 ? 0 : 0x80000000));
}
avio_flush(pb);
pos = avio_tell(pb);
/* Updating one entry in the AVI OpenDML master index */
avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
ffio_wfourcc(pb, "indx"); /* enabling this entry */
avio_skip(pb, 8);
avio_wl32(pb, avi->riff_id); /* nEntriesInUse */
avio_skip(pb, 16 * avi->riff_id);
avio_wl64(pb, ix); /* qwOffset */
avio_wl32(pb, pos - ix); /* dwSize */
ff_parse_specific_params(s->streams[i], &au_byterate, &au_ssize, &au_scale);
if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
avist->sample_requested = 1;
}
avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
} else
avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
avio_seek(pb, pos, SEEK_SET);
}
return 0;
}
static int avi_write_idx1(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
AVIContext *avi = s->priv_data;
int64_t idx_chunk;
int i;
char tag[5];
if (pb->seekable) {
AVIStream *avist;
AVIIentry *ie = 0, *tie;
int empty, stream_id = -1;
idx_chunk = ff_start_tag(pb, "idx1");
for (i = 0; i < s->nb_streams; i++) {
avist = s->streams[i]->priv_data;
avist->entry = 0;
}
do {
empty = 1;
for (i = 0; i < s->nb_streams; i++) {
avist = s->streams[i]->priv_data;
if (avist->indexes.entry <= avist->entry)
continue;
tie = avi_get_ientry(&avist->indexes, avist->entry);
if (empty || tie->pos < ie->pos) {
ie = tie;
stream_id = i;
}
empty = 0;
}
if (!empty) {
avist = s->streams[stream_id]->priv_data;
avi_stream2fourcc(tag, stream_id,
s->streams[stream_id]->codec->codec_type);
ffio_wfourcc(pb, tag);
avio_wl32(pb, ie->flags);
avio_wl32(pb, ie->pos);
avio_wl32(pb, ie->len);
avist->entry++;
}
} while (!empty);
ff_end_tag(pb, idx_chunk);
avi_write_counters(s, avi->riff_id);
}
return 0;
}
static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
{
AVIStream *avist = s->streams[stream_index]->priv_data;
AVCodecContext *enc = s->streams[stream_index]->codec;
av_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
while (enc->block_align == 0 && dts != AV_NOPTS_VALUE &&
dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
AVPacket empty_packet;
if (dts - avist->packet_count > 60000) {
av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
return AVERROR(EINVAL);
}
av_init_packet(&empty_packet);
empty_packet.size = 0;
empty_packet.data = NULL;
empty_packet.stream_index = stream_index;
avi_write_packet(s, &empty_packet);
av_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
}
return 0;
}
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
{
unsigned char tag[5];
unsigned int flags = 0;
const int stream_index = pkt->stream_index;
int size = pkt->size;
AVIContext *avi = s->priv_data;
AVIOContext *pb = s->pb;
AVIStream *avist = s->streams[stream_index]->priv_data;
AVCodecContext *enc = s->streams[stream_index]->codec;
int ret;
if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
if (ret < 0)
return ret;
}
if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
return ret;
if (pkt->dts != AV_NOPTS_VALUE)
avist->last_dts = pkt->dts + pkt->duration;
avist->packet_count++;
// Make sure to put an OpenDML chunk when the file size exceeds the limits
if (pb->seekable &&
(avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
avi_write_ix(s);
ff_end_tag(pb, avi->movi_list);
if (avi->riff_id == 1)
avi_write_idx1(s);
ff_end_tag(pb, avi->riff_start);
avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
}
avi_stream2fourcc(tag, stream_index, enc->codec_type);
if (pkt->flags & AV_PKT_FLAG_KEY)
flags = 0x10;
if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
avist->audio_strm_length += size;
if (s->pb->seekable) {
AVIIndex *idx = &avist->indexes;
int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
if (idx->ents_allocated <= idx->entry) {
idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
if (!idx->cluster) {
idx->ents_allocated = 0;
idx->entry = 0;
return AVERROR(ENOMEM);
}
idx->cluster[cl] =
av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
if (!idx->cluster[cl])
return AVERROR(ENOMEM);
idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
}
idx->cluster[cl][id].flags = flags;
idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
idx->cluster[cl][id].len = size;
avist->max_size = FFMAX(avist->max_size, size);
idx->entry++;
}
avio_write(pb, tag, 4);
avio_wl32(pb, size);
avio_write(pb, pkt->data, size);
if (size & 1)
avio_w8(pb, 0);
return 0;
}
static int avi_write_trailer(AVFormatContext *s)
{
AVIContext *avi = s->priv_data;
AVIOContext *pb = s->pb;
int res = 0;
int i, j, n, nb_frames;
int64_t file_size;
for (i = 0; i < s->nb_streams; i++) {
AVIStream *avist = s->streams[i]->priv_data;
write_skip_frames(s, i, avist->last_dts);
}
if (pb->seekable) {
if (avi->riff_id == 1) {
ff_end_tag(pb, avi->movi_list);
res = avi_write_idx1(s);
ff_end_tag(pb, avi->riff_start);
} else {
avi_write_ix(s);
ff_end_tag(pb, avi->movi_list);
ff_end_tag(pb, avi->riff_start);
file_size = avio_tell(pb);
avio_seek(pb, avi->odml_list - 8, SEEK_SET);
ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
avio_skip(pb, 16);
for (n = nb_frames = 0; n < s->nb_streams; n++) {
AVCodecContext *stream = s->streams[n]->codec;
AVIStream *avist = s->streams[n]->priv_data;
if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
if (nb_frames < avist->packet_count)
nb_frames = avist->packet_count;
} else {
if (stream->codec_id == AV_CODEC_ID_MP2 ||
stream->codec_id == AV_CODEC_ID_MP3)
nb_frames += avist->packet_count;
}
}
avio_wl32(pb, nb_frames);
avio_seek(pb, file_size, SEEK_SET);
avi_write_counters(s, avi->riff_id);
}
}
for (i = 0; i < s->nb_streams; i++) {
AVIStream *avist = s->streams[i]->priv_data;
for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
av_freep(&avist->indexes.cluster[j]);
av_freep(&avist->indexes.cluster);
avist->indexes.ents_allocated = avist->indexes.entry = 0;
if (pb->seekable) {
avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
avio_wl32(pb, avist->max_size);
}
}
return res;
}
AVOutputFormat ff_avi_muxer = {
.name = "avi",
.long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
.mime_type = "video/x-msvideo",
.extensions = "avi",
.priv_data_size = sizeof(AVIContext),
.audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
.video_codec = AV_CODEC_ID_MPEG4,
.write_header = avi_write_header,
.write_packet = avi_write_packet,
.write_trailer = avi_write_trailer,
.codec_tag = (const AVCodecTag * const []) {
ff_codec_bmp_tags, ff_codec_wav_tags, 0
},
};
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