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/* 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 "libavutil/intreadwrite.h"
#include "avformat.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') /* MPEG2 */
#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 MVIh_TAG MKTAG('M', 'V', 'I', 'h') /* CMV header */
#define MVIf_TAG MKTAG('M', 'V', 'I', 'f') /* CMV i-frame */
typedef struct EaDemuxContext {
int big_endian;
enum CodecID video_codec;
AVRational time_base;
int width, height;
int video_stream_index;
enum CodecID audio_codec;
int audio_stream_index;
int audio_frame_counter;
int bytes;
int sample_rate;
int num_channels;
int num_samples;
} EaDemuxContext;
static uint32_t read_arbitary(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;
}
/*
* Process PT/GSTR sound header
* return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
*/
static int process_audio_header_elements(AVFormatContext *s)
{
int inHeader = 1;
EaDemuxContext *ea = s->priv_data;
AVIOContext *pb = s->pb;
int compression_type = -1, revision = -1, revision2 = -1;
ea->bytes = 2;
ea->sample_rate = -1;
ea->num_channels = 1;
while (!url_feof(pb) && inHeader) {
int inSubheader;
uint8_t byte;
byte = avio_r8(pb);
switch (byte) {
case 0xFD:
av_log (s, AV_LOG_DEBUG, "entered audio subheader\n");
inSubheader = 1;
while (!url_feof(pb) && inSubheader) {
uint8_t subbyte;
subbyte = avio_r8(pb);
switch (subbyte) {
case 0x80:
revision = read_arbitary(pb);
av_log (s, AV_LOG_DEBUG, "revision (element 0x80) set to 0x%08x\n", revision);
break;
case 0x82:
ea->num_channels = read_arbitary(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_arbitary(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_arbitary(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_arbitary(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%08x\n", subbyte, read_arbitary(pb));
av_log (s, AV_LOG_DEBUG, "exited audio subheader\n");
inSubheader = 0;
break;
case 0xA0:
revision2 = read_arbitary(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");
inSubheader = 0;
inHeader = 0;
break;
default:
av_log (s, AV_LOG_DEBUG, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
break;
}
}
break;
case 0xFF:
av_log (s, AV_LOG_DEBUG, "end of header block reached\n");
inHeader = 0;
break;
default:
av_log (s, AV_LOG_DEBUG, "header element 0x%02x set to 0x%08x\n", byte, read_arbitary(pb));
break;
}
}
switch (compression_type) {
case 0: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
case 7: ea->audio_codec = CODEC_ID_ADPCM_EA; break;
case -1:
switch (revision) {
case 1: ea->audio_codec = CODEC_ID_ADPCM_EA_R1; break;
case 2: ea->audio_codec = CODEC_ID_ADPCM_EA_R2; break;
case 3: ea->audio_codec = CODEC_ID_ADPCM_EA_R3; break;
case -1: break;
default:
av_log(s, AV_LOG_ERROR, "unsupported stream type; revision=%i\n", revision);
return 0;
}
switch (revision2) {
case 8: ea->audio_codec = CODEC_ID_PCM_S16LE_PLANAR; break;
case 10: ea->audio_codec = CODEC_ID_ADPCM_EA_R2; break;
case 16: ea->audio_codec = CODEC_ID_MP3; break;
case -1: break;
default:
ea->audio_codec = CODEC_ID_NONE;
av_log(s, AV_LOG_ERROR, "unsupported stream type; revision2=%i\n", revision2);
return 0;
}
break;
default:
av_log(s, AV_LOG_ERROR, "unsupported stream type; compression_type=%i\n", compression_type);
return 0;
}
if (ea->sample_rate == -1)
ea->sample_rate = revision==3 ? 48000 : 22050;
return 1;
}
/*
* Process EACS sound header
* return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
*/
static int 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 = CODEC_ID_PCM_S8; break;
case 2: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
}
break;
case 1: ea->audio_codec = CODEC_ID_PCM_MULAW; ea->bytes = 1; break;
case 2: ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_EACS; break;
default:
av_log (s, AV_LOG_ERROR, "unsupported stream type; audio compression_type=%i\n", compression_type);
}
return 1;
}
/*
* Process SEAD sound header
* return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
*/
static int 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 = CODEC_ID_ADPCM_IMA_EA_SEAD;
return 1;
}
static int process_video_header_mdec(AVFormatContext *s)
{
EaDemuxContext *ea = s->priv_data;
AVIOContext *pb = s->pb;
avio_skip(pb, 4);
ea->width = avio_rl16(pb);
ea->height = avio_rl16(pb);
ea->time_base = (AVRational){1,15};
ea->video_codec = CODEC_ID_MDEC;
return 1;
}
static int process_video_header_vp6(AVFormatContext *s)
{
EaDemuxContext *ea = s->priv_data;
AVIOContext *pb = s->pb;
avio_skip(pb, 16);
ea->time_base.den = avio_rl32(pb);
ea->time_base.num = avio_rl32(pb);
ea->video_codec = CODEC_ID_VP6;
return 1;
}
/*
* Process EA file header
* Returns 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++) {
unsigned int startpos = avio_tell(pb);
int err = 0;
blockid = avio_rl32(pb);
size = avio_rl32(pb);
if (i == 0)
ea->big_endian = size > 0x000FFFFF;
if (ea->big_endian)
size = av_bswap32(size);
switch (blockid) {
case ISNh_TAG:
if (avio_rl32(pb) != EACS_TAG) {
av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
return 0;
}
err = 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 & 0xFFFF)!=PT00_TAG) {
av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
return 0;
}
err = process_audio_header_elements(s);
break;
case SEAD_TAG:
err = process_audio_header_sead(s);
break;
case MVIh_TAG :
ea->video_codec = CODEC_ID_CMV;
break;
case kVGT_TAG:
ea->video_codec = CODEC_ID_TGV;
break;
case mTCD_TAG :
err = process_video_header_mdec(s);
break;
case MPCh_TAG:
ea->video_codec = CODEC_ID_MPEG2VIDEO;
break;
case pQGT_TAG:
case TGQs_TAG:
ea->video_codec = CODEC_ID_TGQ;
break;
case pIQT_TAG:
ea->video_codec = CODEC_ID_TQI;
break;
case MADk_TAG :
ea->video_codec = CODEC_ID_MAD;
break;
case MVhd_TAG :
err = process_video_header_vp6(s);
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(AVProbeData *p)
{
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:
break;
default:
return 0;
}
if (AV_RL32(&p->buf[4]) > 0xfffff && AV_RB32(&p->buf[4]) > 0xfffff)
return 0;
return AVPROBE_SCORE_MAX;
}
static int ea_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
EaDemuxContext *ea = s->priv_data;
AVStream *st;
if (process_ea_header(s)<=0)
return AVERROR(EIO);
if (ea->video_codec) {
/* initialize the video decoder stream */
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
ea->video_stream_index = st->index;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = ea->video_codec;
// parsing is necessary to make FFmpeg generate correct timestamps
if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO)
st->need_parsing = AVSTREAM_PARSE_HEADERS;
st->codec->codec_tag = 0; /* no fourcc */
if (ea->time_base.num)
avpriv_set_pts_info(st, 64, ea->time_base.num, ea->time_base.den);
st->codec->width = ea->width;
st->codec->height = ea->height;
}
if (ea->audio_codec) {
if (ea->num_channels <= 0) {
av_log(s, AV_LOG_WARNING, "Unsupported number of channels: %d\n", ea->num_channels);
ea->audio_codec = 0;
return 1;
}
if (ea->sample_rate <= 0) {
av_log(s, AV_LOG_ERROR, "Unsupported sample rate: %d\n", ea->sample_rate);
ea->audio_codec = 0;
return 1;
}
if (ea->bytes <= 0) {
av_log(s, AV_LOG_ERROR, "Invalid number of bytes per sample: %d\n", ea->bytes);
ea->audio_codec = CODEC_ID_NONE;
return 1;
}
/* 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->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = ea->audio_codec;
st->codec->codec_tag = 0; /* no tag */
st->codec->channels = ea->num_channels;
st->codec->sample_rate = ea->sample_rate;
st->codec->bits_per_coded_sample = ea->bytes * 8;
st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
st->codec->bits_per_coded_sample / 4;
st->codec->block_align = st->codec->channels*st->codec->bits_per_coded_sample;
ea->audio_stream_index = st->index;
ea->audio_frame_counter = 0;
}
return 1;
}
static int ea_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
EaDemuxContext *ea = s->priv_data;
AVIOContext *pb = s->pb;
int ret = 0;
int packet_read = 0;
unsigned int chunk_type, chunk_size;
int key = 0;
int av_uninit(num_samples);
while (!packet_read) {
chunk_type = avio_rl32(pb);
chunk_size = (ea->big_endian ? avio_rb32(pb) : avio_rl32(pb)) - 8;
switch (chunk_type) {
/* audio data */
case ISNh_TAG:
/* header chunk also contains data; skip over the header portion*/
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 == CODEC_ID_PCM_S16LE_PLANAR ||
ea->audio_codec == CODEC_ID_MP3) {
num_samples = avio_rl32(pb);
avio_skip(pb, 8);
chunk_size -= 12;
}
ret = av_get_packet(pb, pkt, chunk_size);
if (ret < 0)
return ret;
pkt->stream_index = ea->audio_stream_index;
pkt->pts = 90000;
pkt->pts *= ea->audio_frame_counter;
pkt->pts /= ea->sample_rate;
switch (ea->audio_codec) {
case CODEC_ID_ADPCM_EA:
/* 2 samples/byte, 1 or 2 samples per frame depending
* on stereo; chunk also has 12-byte header */
ea->audio_frame_counter += ((chunk_size - 12) * 2) /
ea->num_channels;
break;
case CODEC_ID_PCM_S16LE_PLANAR:
case CODEC_ID_MP3:
ea->audio_frame_counter += num_samples;
break;
default:
ea->audio_frame_counter += 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:
ret = AVERROR(EIO);
packet_read = 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:
avio_seek(pb, -8, SEEK_CUR); // include chunk preamble
chunk_size += 8;
goto get_video_packet;
case mTCD_TAG:
avio_skip(pb, 8); // skip ea dct header
chunk_size -= 8;
goto get_video_packet;
case MV0K_TAG:
case MPCh_TAG:
case pIQT_TAG:
key = AV_PKT_FLAG_KEY;
case MV0F_TAG:
get_video_packet:
ret = av_get_packet(pb, pkt, chunk_size);
if (ret < 0)
return ret;
pkt->stream_index = ea->video_stream_index;
pkt->flags |= key;
packet_read = 1;
break;
default:
avio_skip(pb, chunk_size);
break;
}
}
return ret;
}
AVInputFormat ff_ea_demuxer = {
.name = "ea",
.long_name = NULL_IF_CONFIG_SMALL("Electronic Arts Multimedia Format"),
.priv_data_size = sizeof(EaDemuxContext),
.read_probe = ea_probe,
.read_header = ea_read_header,
.read_packet = ea_read_packet,
};
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