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Diffstat (limited to 'contrib/ffmpeg/libavformat/electronicarts.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/electronicarts.c | 473 |
1 files changed, 473 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavformat/electronicarts.c b/contrib/ffmpeg/libavformat/electronicarts.c new file mode 100644 index 000000000..0201e8200 --- /dev/null +++ b/contrib/ffmpeg/libavformat/electronicarts.c @@ -0,0 +1,473 @@ +/* Electronic Arts Multimedia File Demuxer + * Copyright (c) 2004 The ffmpeg Project + * + * 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 electronicarts.c + * Electronic Arts Multimedia file demuxer (WVE/UV2/etc.) + * by Robin Kay (komadori at gekkou.co.uk) + */ + +#include "avformat.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 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 MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD i-frame */ +#define MPCh_TAG MKTAG('M', 'P', 'C', 'h') /* MPEG2 */ +#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 */ + +typedef struct EaDemuxContext { + int big_endian; + + int video_codec; + AVRational time_base; + int video_stream_index; + + int audio_codec; + int audio_stream_index; + int audio_frame_counter; + + int64_t audio_pts; + + int bytes; + int sample_rate; + int num_channels; + int num_samples; +} EaDemuxContext; + +static uint32_t read_arbitary(ByteIOContext *pb) { + uint8_t size, byte; + int i; + uint32_t word; + + size = get_byte(pb); + + word = 0; + for (i = 0; i < size; i++) { + byte = get_byte(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; + ByteIOContext *pb = s->pb; + int compression_type = -1, revision = -1, revision2 = -1; + + ea->bytes = 2; + ea->sample_rate = -1; + ea->num_channels = 1; + + while (inHeader) { + int inSubheader; + uint8_t byte; + byte = get_byte(pb); + + switch (byte) { + case 0xFD: + av_log (s, AV_LOG_INFO, "entered audio subheader\n"); + inSubheader = 1; + while (inSubheader) { + uint8_t subbyte; + subbyte = get_byte(pb); + + switch (subbyte) { + case 0x80: + revision = read_arbitary(pb); + av_log (s, AV_LOG_INFO, "revision (element 0x80) set to 0x%08x\n", revision); + break; + case 0x82: + ea->num_channels = read_arbitary(pb); + av_log (s, AV_LOG_INFO, "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_INFO, "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_INFO, "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_INFO, "num_samples (element 0x85) set to 0x%08x\n", ea->num_samples); + break; + case 0x8A: + av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb)); + av_log (s, AV_LOG_INFO, "exited audio subheader\n"); + inSubheader = 0; + break; + case 0xA0: + revision2 = read_arbitary(pb); + av_log (s, AV_LOG_INFO, "revision2 (element 0xA0) set to 0x%08x\n", revision2); + break; + case 0xFF: + av_log (s, AV_LOG_INFO, "end of header block reached (within audio subheader)\n"); + inSubheader = 0; + inHeader = 0; + break; + default: + av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb)); + break; + } + } + break; + case 0xFF: + av_log (s, AV_LOG_INFO, "end of header block reached\n"); + inHeader = 0; + break; + default: + av_log (s, AV_LOG_INFO, "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; + default: + 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; + ByteIOContext *pb = s->pb; + int compression_type; + + ea->sample_rate = ea->big_endian ? get_be32(pb) : get_le32(pb); + ea->bytes = get_byte(pb); /* 1=8-bit, 2=16-bit */ + ea->num_channels = get_byte(pb); + compression_type = get_byte(pb); + url_fskip(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; + ByteIOContext *pb = s->pb; + + ea->sample_rate = get_le32(pb); + ea->bytes = get_le32(pb); /* 1=8-bit, 2=16-bit */ + ea->num_channels = get_le32(pb); + ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_SEAD; + + return 1; +} + +static int process_video_header_vp6(AVFormatContext *s) +{ + EaDemuxContext *ea = s->priv_data; + ByteIOContext *pb = s->pb; + + url_fskip(pb, 16); + ea->time_base.den = get_le32(pb); + ea->time_base.num = get_le32(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; + ByteIOContext *pb = s->pb; + int i; + + for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) { + unsigned int startpos = url_ftell(pb); + int err = 0; + + blockid = get_le32(pb); + size = get_le32(pb); + if (i == 0) + ea->big_endian = size > 0x000FFFFF; + if (ea->big_endian) + size = bswap_32(size); + + switch (blockid) { + case ISNh_TAG: + if (get_le32(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 : + blockid = get_le32(pb); + if (blockid == GSTR_TAG) { + url_fskip(pb, 4); + } else if (blockid != 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 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; + } + + url_fseek(pb, startpos + size, SEEK_SET); + } + + url_fseek(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 kVGT_TAG: + case MADk_TAG: + case MPCh_TAG: + case MVhd_TAG: + case MVIh_TAG: + return AVPROBE_SCORE_MAX; + } + return 0; +} + +static int ea_read_header(AVFormatContext *s, + AVFormatParameters *ap) +{ + EaDemuxContext *ea = s->priv_data; + AVStream *st; + + if (!process_ea_header(s)) + return AVERROR(EIO); + + if (ea->video_codec) { + /* initialize the video decoder stream */ + st = av_new_stream(s, 0); + if (!st) + return AVERROR(ENOMEM); + ea->video_stream_index = st->index; + st->codec->codec_type = CODEC_TYPE_VIDEO; + st->codec->codec_id = ea->video_codec; + st->codec->codec_tag = 0; /* no fourcc */ + st->codec->time_base = ea->time_base; + } + + if (ea->audio_codec) { + /* initialize the audio decoder stream */ + st = av_new_stream(s, 0); + if (!st) + return AVERROR(ENOMEM); + av_set_pts_info(st, 33, 1, ea->sample_rate); + st->codec->codec_type = CODEC_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_sample = ea->bytes * 8; + st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * + st->codec->bits_per_sample / 4; + st->codec->block_align = st->codec->channels*st->codec->bits_per_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; + ByteIOContext *pb = s->pb; + int ret = 0; + int packet_read = 0; + unsigned int chunk_type, chunk_size; + int key = 0; + + while (!packet_read) { + chunk_type = get_le32(pb); + chunk_size = (ea->big_endian ? get_be32(pb) : get_le32(pb)) - 8; + + switch (chunk_type) { + /* audio data */ + case ISNh_TAG: + /* header chunk also contains data; skip over the header portion*/ + url_fskip(pb, 32); + chunk_size -= 32; + case ISNd_TAG: + case SCDl_TAG: + case SNDC_TAG: + if (!ea->audio_codec) { + url_fskip(pb, chunk_size); + break; + } else if (ea->audio_codec == CODEC_ID_PCM_S16LE_PLANAR) { + url_fskip(pb, 12); /* planar header */ + chunk_size -= 12; + } + ret = av_get_packet(pb, pkt, chunk_size); + if (ret != chunk_size) + ret = AVERROR(EIO); + else { + 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; + 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: + ret = AVERROR(EIO); + packet_read = 1; + break; + + case MV0K_TAG: + key = PKT_FLAG_KEY; + case MV0F_TAG: + ret = av_get_packet(pb, pkt, chunk_size); + if (ret != chunk_size) + ret = AVERROR_IO; + else { + pkt->stream_index = ea->video_stream_index; + pkt->flags |= key; + } + packet_read = 1; + break; + + default: + url_fseek(pb, chunk_size, SEEK_CUR); + break; + } + } + + return ret; +} + +AVInputFormat ea_demuxer = { + "ea", + "Electronic Arts Multimedia Format", + sizeof(EaDemuxContext), + ea_probe, + ea_read_header, + ea_read_packet, +}; |