RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
ffmpeg/libavformat/electronicarts.c

803 lines
25 KiB
C
Raw Blame History

/* Electronic Arts Multimedia File Demuxer
* Copyright (c) 2004 The FFmpeg project
* Copyright (c) 2006-2008 Peter Ross
*
* 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
* Electronic Arts Multimedia file demuxer (WVE/UV2/etc.)
* by Robin Kay (komadori at gekkou.co.uk)
*/
#include <inttypes.h>
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "demux.h"
#include "internal.h"
#define SCHl_TAG MKTAG('S', 'C', 'H', 'l')
#define SEAD_TAG MKTAG('S', 'E', 'A', 'D') /* Sxxx header */
#define SNDC_TAG MKTAG('S', 'N', 'D', 'C') /* Sxxx data */
#define SEND_TAG MKTAG('S', 'E', 'N', 'D') /* Sxxx end */
#define SHEN_TAG MKTAG('S', 'H', 'E', 'N') /* SxEN header */
#define SDEN_TAG MKTAG('S', 'D', 'E', 'N') /* SxEN data */
#define SEEN_TAG MKTAG('S', 'E', 'E', 'N') /* SxEN end */
#define ISNh_TAG MKTAG('1', 'S', 'N', 'h') /* 1SNx header */
#define EACS_TAG MKTAG('E', 'A', 'C', 'S')
#define ISNd_TAG MKTAG('1', 'S', 'N', 'd') /* 1SNx data */
#define ISNe_TAG MKTAG('1', 'S', 'N', 'e') /* 1SNx end */
#define PT00_TAG MKTAG('P', 'T', 0x0, 0x0)
#define GSTR_TAG MKTAG('G', 'S', 'T', 'R')
#define SCDl_TAG MKTAG('S', 'C', 'D', 'l')
#define SCEl_TAG MKTAG('S', 'C', 'E', 'l')
#define kVGT_TAG MKTAG('k', 'V', 'G', 'T') /* TGV I-frame */
#define fVGT_TAG MKTAG('f', 'V', 'G', 'T') /* TGV P-frame */
#define mTCD_TAG MKTAG('m', 'T', 'C', 'D') /* MDEC */
#define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD I-frame */
#define MADm_TAG MKTAG('M', 'A', 'D', 'm') /* MAD P-frame */
#define MADe_TAG MKTAG('M', 'A', 'D', 'e') /* MAD lqp-frame */
#define MPCh_TAG MKTAG('M', 'P', 'C', 'h') /* MPEG-2 */
#define TGQs_TAG MKTAG('T', 'G', 'Q', 's') /* TGQ I-frame (appears in .TGQ files) */
#define pQGT_TAG MKTAG('p', 'Q', 'G', 'T') /* TGQ I-frame (appears in .UV files) */
#define pIQT_TAG MKTAG('p', 'I', 'Q', 'T') /* TQI/UV2 I-frame (.UV2/.WVE) */
#define MVhd_TAG MKTAG('M', 'V', 'h', 'd')
#define MV0K_TAG MKTAG('M', 'V', '0', 'K')
#define MV0F_TAG MKTAG('M', 'V', '0', 'F')
#define AVhd_TAG MKTAG('A', 'V', 'h', 'd')
#define AV0K_TAG MKTAG('A', 'V', '0', 'K')
#define AV0F_TAG MKTAG('A', 'V', '0', 'F')
#define MVIh_TAG MKTAG('M', 'V', 'I', 'h') /* CMV header */
#define MVIf_TAG MKTAG('M', 'V', 'I', 'f') /* CMV I-frame */
#define AVP6_TAG MKTAG('A', 'V', 'P', '6')
typedef struct VideoProperties {
enum AVCodecID codec;
AVRational time_base;
int width, height;
int nb_frames;
int stream_index;
} VideoProperties;
typedef struct EaDemuxContext {
const AVClass *class;
int big_endian;
VideoProperties video, alpha;
enum AVCodecID audio_codec;
int audio_stream_index;
int bytes;
int sample_rate;
int num_channels;
int num_samples;
int platform;
int merge_alpha;
} EaDemuxContext;
static uint32_t read_arbitrary(AVIOContext *pb)
{
uint8_t size, byte;
int i;
uint32_t word;
size = avio_r8(pb);
word = 0;
for (i = 0; i < size; i++) {
byte = avio_r8(pb);
word <<= 8;
word |= byte;
}
return word;
}
static int process_audio_header_elements(AVFormatContext *s)
{
EaDemuxContext *ea = s->priv_data;
AVIOContext *pb = s->pb;
int in_header = 1;
int compression_type = -1, revision = -1, revision2 = -1;
ea->bytes = 2;
ea->sample_rate = -1;
ea->num_channels = 1;
while (!avio_feof(pb) && in_header) {
int in_subheader;
uint8_t byte;
byte = avio_r8(pb);
switch (byte) {
case 0xFD:
av_log(s, AV_LOG_DEBUG, "entered audio subheader\n");
in_subheader = 1;
while (!avio_feof(pb) && in_subheader) {
uint8_t subbyte;
subbyte = avio_r8(pb);
switch (subbyte) {
case 0x80:
revision = read_arbitrary(pb);
av_log(s, AV_LOG_DEBUG,
"revision (element 0x80) set to 0x%08x\n", revision);
break;
case 0x82:
ea->num_channels = read_arbitrary(pb);
av_log(s, AV_LOG_DEBUG,
"num_channels (element 0x82) set to 0x%08x\n",
ea->num_channels);
break;
case 0x83:
compression_type = read_arbitrary(pb);
av_log(s, AV_LOG_DEBUG,
"compression_type (element 0x83) set to 0x%08x\n",
compression_type);
break;
case 0x84:
ea->sample_rate = read_arbitrary(pb);
av_log(s, AV_LOG_DEBUG,
"sample_rate (element 0x84) set to %i\n",
ea->sample_rate);
break;
case 0x85:
ea->num_samples = read_arbitrary(pb);
av_log(s, AV_LOG_DEBUG,
"num_samples (element 0x85) set to 0x%08x\n",
ea->num_samples);
break;
case 0x8A:
av_log(s, AV_LOG_DEBUG,
"element 0x%02x set to 0x%08"PRIx32"\n",
subbyte, read_arbitrary(pb));
av_log(s, AV_LOG_DEBUG, "exited audio subheader\n");
in_subheader = 0;
break;
case 0xA0:
revision2 = read_arbitrary(pb);
av_log(s, AV_LOG_DEBUG,
"revision2 (element 0xA0) set to 0x%08x\n",
revision2);
break;
case 0xFF:
av_log(s, AV_LOG_DEBUG,
"end of header block reached (within audio subheader)\n");
in_subheader = 0;
in_header = 0;
break;
default:
av_log(s, AV_LOG_DEBUG,
"element 0x%02x set to 0x%08"PRIx32"\n",
subbyte, read_arbitrary(pb));
break;
}
}
break;
case 0xFF:
av_log(s, AV_LOG_DEBUG, "end of header block reached\n");
in_header = 0;
break;
case 0x1B:
ea->video.time_base = (AVRational) {1, read_arbitrary(pb)};
av_log(s, AV_LOG_DEBUG, "Setting framerate to %u\n", ea->video.time_base.den);
break;
default:
av_log(s, AV_LOG_DEBUG,
"header element 0x%02x set to 0x%08"PRIx32"\n",
byte, read_arbitrary(pb));
break;
}
}
switch (compression_type) {
case 0:
ea->audio_codec = AV_CODEC_ID_PCM_S16LE;
break;
case 7:
ea->audio_codec = AV_CODEC_ID_ADPCM_EA;
break;
case -1:
switch (revision) {
case 1:
ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R1;
break;
case 2:
ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R2;
break;
case 3:
ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R3;
break;
case -1:
break;
default:
avpriv_request_sample(s, "stream type; revision=%i", revision);
return 0;
}
switch (revision2) {
case 8:
ea->audio_codec = AV_CODEC_ID_PCM_S16LE_PLANAR;
break;
case 10:
switch (revision) {
case -1:
case 2: ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R1; break;
case 3: ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R2; break;
default:
avpriv_request_sample(s, "stream type; revision=%i, revision2=%i", revision, revision2);
return 0;
}
break;
case 15:
case 16:
ea->audio_codec = AV_CODEC_ID_MP3;
break;
case -1:
break;
default:
ea->audio_codec = AV_CODEC_ID_NONE;
avpriv_request_sample(s, "stream type; revision2=%i", revision2);
return 0;
}
break;
default:
avpriv_request_sample(s,
"stream type; compression_type=%i",
compression_type);
return 0;
}
if (ea->audio_codec == AV_CODEC_ID_NONE && ea->platform == 0x01)
ea->audio_codec = AV_CODEC_ID_ADPCM_PSX;
if (ea->sample_rate == -1)
ea->sample_rate = revision == 3 ? 48000 : 22050;
return 1;
}
static void process_audio_header_eacs(AVFormatContext *s)
{
EaDemuxContext *ea = s->priv_data;
AVIOContext *pb = s->pb;
int compression_type;
ea->sample_rate = ea->big_endian ? avio_rb32(pb) : avio_rl32(pb);
ea->bytes = avio_r8(pb); /* 1=8-bit, 2=16-bit */
ea->num_channels = avio_r8(pb);
compression_type = avio_r8(pb);
avio_skip(pb, 13);
switch (compression_type) {
case 0:
switch (ea->bytes) {
case 1:
ea->audio_codec = AV_CODEC_ID_PCM_S8;
break;
case 2:
ea->audio_codec = AV_CODEC_ID_PCM_S16LE;
break;
}
break;
case 1:
ea->audio_codec = AV_CODEC_ID_PCM_MULAW;
ea->bytes = 1;
break;
case 2:
ea->audio_codec = AV_CODEC_ID_ADPCM_IMA_EA_EACS;
break;
default:
avpriv_request_sample(s,
"stream type; audio compression_type=%i",
compression_type);
}
}
static void process_audio_header_sead(AVFormatContext *s)
{
EaDemuxContext *ea = s->priv_data;
AVIOContext *pb = s->pb;
ea->sample_rate = avio_rl32(pb);
ea->bytes = avio_rl32(pb); /* 1=8-bit, 2=16-bit */
ea->num_channels = avio_rl32(pb);
ea->audio_codec = AV_CODEC_ID_ADPCM_IMA_EA_SEAD;
}
static void process_video_header_mdec(AVFormatContext *s, VideoProperties *video)
{
AVIOContext *pb = s->pb;
avio_skip(pb, 4);
video->width = avio_rl16(pb);
video->height = avio_rl16(pb);
if (!video->time_base.num)
video->time_base = (AVRational) { 1, 15 };
video->codec = AV_CODEC_ID_MDEC;
}
static int process_video_header_vp6(AVFormatContext *s, VideoProperties *video)
{
AVIOContext *pb = s->pb;
avio_skip(pb, 8);
video->nb_frames = avio_rl32(pb);
avio_skip(pb, 4);
video->time_base.den = avio_rl32(pb);
video->time_base.num = avio_rl32(pb);
if (video->time_base.den <= 0 || video->time_base.num <= 0) {
av_log(s, AV_LOG_ERROR, "Timebase is invalid\n");
return AVERROR_INVALIDDATA;
}
video->codec = AV_CODEC_ID_VP6;
return 1;
}
static void process_video_header_cmv(AVFormatContext *s, VideoProperties *video)
{
int fps;
avio_skip(s->pb, 10);
fps = avio_rl16(s->pb);
if (fps)
video->time_base = (AVRational) { 1, fps };
video->codec = AV_CODEC_ID_CMV;
}
/* Process EA file header.
* Return 1 if the EA file is valid and successfully opened, 0 otherwise. */
static int process_ea_header(AVFormatContext *s)
{
uint32_t blockid, size = 0;
EaDemuxContext *ea = s->priv_data;
AVIOContext *pb = s->pb;
int i;
for (i = 0; i < 5 && (!ea->audio_codec || !ea->video.codec); i++) {
uint64_t startpos = avio_tell(pb);
int err = 0;
blockid = avio_rl32(pb);
size = avio_rl32(pb);
if (i == 0)
ea->big_endian = size > av_bswap32(size);
if (ea->big_endian)
size = av_bswap32(size);
if (size < 8) {
av_log(s, AV_LOG_ERROR, "chunk size too small\n");
return AVERROR_INVALIDDATA;
}
switch (blockid) {
case ISNh_TAG:
if (avio_rl32(pb) != EACS_TAG) {
avpriv_request_sample(s, "unknown 1SNh headerid");
return 0;
}
process_audio_header_eacs(s);
break;
case SCHl_TAG:
case SHEN_TAG:
blockid = avio_rl32(pb);
if (blockid == GSTR_TAG) {
avio_skip(pb, 4);
} else if ((blockid & 0xFF) != (PT00_TAG & 0xFF)) {
blockid = avio_rl32(pb);
}
ea->platform = (blockid >> 16) & 0xFF;
err = process_audio_header_elements(s);
break;
case SEAD_TAG:
process_audio_header_sead(s);
break;
case MVIh_TAG:
process_video_header_cmv(s, &ea->video);
break;
case kVGT_TAG:
ea->video.codec = AV_CODEC_ID_TGV;
break;
case mTCD_TAG:
process_video_header_mdec(s, &ea->video);
break;
case MPCh_TAG:
ea->video.codec = AV_CODEC_ID_MPEG2VIDEO;
break;
case pQGT_TAG:
case TGQs_TAG:
ea->video.codec = AV_CODEC_ID_TGQ;
if (!ea->video.time_base.num)
ea->video.time_base = (AVRational) { 1, 15 };
break;
case pIQT_TAG:
ea->video.codec = AV_CODEC_ID_TQI;
if (!ea->video.time_base.num)
ea->video.time_base = (AVRational) { 1, 15 };
break;
case MADk_TAG:
ea->video.codec = AV_CODEC_ID_MAD;
avio_skip(pb, 6);
ea->video.time_base = (AVRational) { avio_rl16(pb), 1000 };
break;
case MVhd_TAG:
err = process_video_header_vp6(s, &ea->video);
break;
case AVhd_TAG:
err = process_video_header_vp6(s, &ea->alpha);
if (err >= 0 && ea->video.codec == AV_CODEC_ID_VP6 && ea->merge_alpha) {
ea->alpha.codec = 0;
ea->video.codec = AV_CODEC_ID_VP6A;
}
break;
}
if (err < 0) {
av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
return err;
}
avio_seek(pb, startpos + size, SEEK_SET);
}
avio_seek(pb, 0, SEEK_SET);
return 1;
}
static int ea_probe(const AVProbeData *p)
{
unsigned big_endian, size;
switch (AV_RL32(&p->buf[0])) {
case ISNh_TAG:
case SCHl_TAG:
case SEAD_TAG:
case SHEN_TAG:
case kVGT_TAG:
case MADk_TAG:
case MPCh_TAG:
case MVhd_TAG:
case MVIh_TAG:
case AVP6_TAG:
break;
default:
return 0;
}
size = AV_RL32(&p->buf[4]);
big_endian = size > 0x000FFFFF;
if (big_endian)
size = av_bswap32(size);
if (size > 0xfffff || size < 8)
return 0;
return AVPROBE_SCORE_MAX;
}
static int init_video_stream(AVFormatContext *s, VideoProperties *video)
{
AVStream *st;
if (!video->codec)
return 0;
/* initialize the video decoder stream */
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
video->stream_index = st->index;
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = video->codec;
// parsing is necessary to make FFmpeg generate correct timestamps
if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO)
ffstream(st)->need_parsing = AVSTREAM_PARSE_HEADERS;
st->codecpar->codec_tag = 0; /* no fourcc */
st->codecpar->width = video->width;
st->codecpar->height = video->height;
st->duration = st->nb_frames = video->nb_frames;
if (video->time_base.num)
avpriv_set_pts_info(st, 64, video->time_base.num, video->time_base.den);
st->r_frame_rate =
st->avg_frame_rate = av_inv_q(video->time_base);
return 0;
}
static int ea_read_header(AVFormatContext *s)
{
EaDemuxContext *ea = s->priv_data;
AVStream *st;
if (process_ea_header(s)<=0)
return AVERROR(EIO);
if (init_video_stream(s, &ea->video) || init_video_stream(s, &ea->alpha))
return AVERROR(ENOMEM);
if (ea->audio_codec) {
if (ea->num_channels <= 0 || ea->num_channels > 2) {
av_log(s, AV_LOG_WARNING,
"Unsupported number of channels: %d\n", ea->num_channels);
goto no_audio;
}
if (ea->sample_rate <= 0) {
av_log(s, AV_LOG_ERROR,
"Unsupported sample rate: %d\n", ea->sample_rate);
goto no_audio;
}
if (ea->bytes <= 0 || ea->bytes > 2) {
av_log(s, AV_LOG_ERROR,
"Invalid number of bytes per sample: %d\n", ea->bytes);
goto no_audio;
}
/* initialize the audio decoder stream */
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avpriv_set_pts_info(st, 33, 1, ea->sample_rate);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = ea->audio_codec;
st->codecpar->codec_tag = 0; /* no tag */
st->codecpar->ch_layout.nb_channels = ea->num_channels;
st->codecpar->sample_rate = ea->sample_rate;
st->codecpar->bits_per_coded_sample = ea->bytes * 8;
st->codecpar->bit_rate = (int64_t)ea->num_channels *
st->codecpar->sample_rate *
st->codecpar->bits_per_coded_sample / 4;
st->codecpar->block_align = ea->num_channels *
st->codecpar->bits_per_coded_sample;
ea->audio_stream_index = st->index;
st->start_time = 0;
return 0;
}
no_audio:
ea->audio_codec = AV_CODEC_ID_NONE;
if (!ea->video.codec)
return AVERROR_INVALIDDATA;
return 0;
}
static int ea_read_packet(AVFormatContext *s, AVPacket *pkt)
{
EaDemuxContext *ea = s->priv_data;
AVIOContext *pb = s->pb;
int partial_packet = 0;
int hit_end = 0;
unsigned int chunk_type, chunk_size;
int ret = 0, packet_read = 0, key = 0, vp6a;
int av_uninit(num_samples);
while ((!packet_read && !hit_end) || partial_packet) {
chunk_type = avio_rl32(pb);
if (avio_feof(pb))
return AVERROR_EOF;
chunk_size = ea->big_endian ? avio_rb32(pb) : avio_rl32(pb);
if (chunk_size < 8)
return AVERROR_INVALIDDATA;
chunk_size -= 8;
switch (chunk_type) {
/* audio data */
case ISNh_TAG:
/* header chunk also contains data; skip over the header portion */
if (chunk_size < 32)
return AVERROR_INVALIDDATA;
avio_skip(pb, 32);
chunk_size -= 32;
case ISNd_TAG:
case SCDl_TAG:
case SNDC_TAG:
case SDEN_TAG:
if (!ea->audio_codec) {
avio_skip(pb, chunk_size);
break;
} else if (ea->audio_codec == AV_CODEC_ID_PCM_S16LE_PLANAR ||
ea->audio_codec == AV_CODEC_ID_MP3) {
if (chunk_size < 12)
return AVERROR_INVALIDDATA;
num_samples = avio_rl32(pb);
avio_skip(pb, 8);
chunk_size -= 12;
} else if (ea->audio_codec == AV_CODEC_ID_ADPCM_PSX) {
if (chunk_size < 8)
return AVERROR_INVALIDDATA;
avio_skip(pb, 8);
chunk_size -= 8;
}
if (partial_packet) {
avpriv_request_sample(s, "video header followed by audio packet");
av_packet_unref(pkt);
partial_packet = 0;
}
if (!chunk_size)
continue;
ret = av_get_packet(pb, pkt, chunk_size);
if (ret < 0)
return ret;
pkt->stream_index = ea->audio_stream_index;
switch (ea->audio_codec) {
case AV_CODEC_ID_ADPCM_EA:
case AV_CODEC_ID_ADPCM_EA_R1:
case AV_CODEC_ID_ADPCM_EA_R2:
case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
case AV_CODEC_ID_ADPCM_EA_R3:
if (pkt->size < 4) {
av_log(s, AV_LOG_ERROR, "Packet is too short\n");
return AVERROR_INVALIDDATA;
}
if (ea->audio_codec == AV_CODEC_ID_ADPCM_EA_R3)
pkt->duration = AV_RB32(pkt->data);
else
pkt->duration = AV_RL32(pkt->data);
break;
case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
pkt->duration = ret * 2 / ea->num_channels;
break;
case AV_CODEC_ID_PCM_S16LE_PLANAR:
case AV_CODEC_ID_MP3:
pkt->duration = num_samples;
break;
case AV_CODEC_ID_ADPCM_PSX:
pkt->duration = chunk_size / (16 * ea->num_channels) * 28;
break;
default:
pkt->duration = chunk_size / (ea->bytes * ea->num_channels);
}
packet_read = 1;
break;
/* ending tag */
case 0:
case ISNe_TAG:
case SCEl_TAG:
case SEND_TAG:
case SEEN_TAG:
while (!avio_feof(pb)) {
int tag = avio_rl32(pb);
if (tag == ISNh_TAG ||
tag == SCHl_TAG ||
tag == SEAD_TAG ||
tag == SHEN_TAG) {
avio_skip(pb, -4);
break;
}
}
if (avio_feof(pb))
ret = AVERROR_EOF;
hit_end = 1;
break;
case MVIh_TAG:
case kVGT_TAG:
case pQGT_TAG:
case TGQs_TAG:
case MADk_TAG:
key = AV_PKT_FLAG_KEY;
case MVIf_TAG:
case fVGT_TAG:
case MADm_TAG:
case MADe_TAG:
if (chunk_size > INT_MAX - 8)
return AVERROR_INVALIDDATA;
avio_seek(pb, -8, SEEK_CUR); // include chunk preamble
chunk_size += 8;
goto get_video_packet;
case mTCD_TAG:
if (chunk_size < 8)
return AVERROR_INVALIDDATA;
avio_skip(pb, 8); // skip ea DCT header
chunk_size -= 8;
goto get_video_packet;
case MV0K_TAG:
case AV0K_TAG:
case MPCh_TAG:
case pIQT_TAG:
key = AV_PKT_FLAG_KEY;
case MV0F_TAG:
case AV0F_TAG:
get_video_packet:
if (!chunk_size)
continue;
if (chunk_size > INT_MAX - 3)
return AVERROR_INVALIDDATA;
vp6a = (ea->video.codec == AV_CODEC_ID_VP6A && (chunk_type == MV0F_TAG || chunk_type == MV0K_TAG));
if (partial_packet) {
ret = av_append_packet(pb, pkt, chunk_size);
} else {
if (vp6a)
avio_seek(pb, -3, SEEK_CUR);
ret = av_get_packet(pb, pkt, chunk_size + (vp6a ? 3 : 0));
if (ret >= 0 && vp6a)
AV_WB24(pkt->data, chunk_size);
}
packet_read = 1;
if (ret < 0) {
partial_packet = 0;
break;
}
partial_packet = vp6a || chunk_type == MVIh_TAG;
if (ea->alpha.codec && (chunk_type == AV0K_TAG || chunk_type == AV0F_TAG))
pkt->stream_index = ea->alpha.stream_index;
else
pkt->stream_index = ea->video.stream_index;
pkt->flags |= key;
break;
default:
avio_skip(pb, chunk_size);
break;
}
}
if (ret >= 0 && hit_end && !packet_read)
return AVERROR(EAGAIN);
return ret;
}
#define OFFSET(x) offsetof(EaDemuxContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
{"merge_alpha", "return VP6 alpha in the main video stream", OFFSET(merge_alpha), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
{NULL}
};
static const AVClass ea_class = {
.class_name = "ea demuxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFInputFormat ff_ea_demuxer = {
.p.name = "ea",
.p.long_name = NULL_IF_CONFIG_SMALL("Electronic Arts Multimedia"),
.p.priv_class = &ea_class,
.priv_data_size = sizeof(EaDemuxContext),
.read_probe = ea_probe,
.read_header = ea_read_header,
.read_packet = ea_read_packet,
};
Reference in New Issue View Git Blame Copy Permalink