diff options
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/Makefile | 2 | ||||
| -rw-r--r-- | libavformat/allformats.c | 2 | ||||
| -rw-r--r-- | libavformat/avformat.h | 6 | ||||
| -rw-r--r-- | libavformat/idroq.c | 299 | ||||
| -rw-r--r-- | libavformat/ipmovie.c | 618 |
5 files changed, 926 insertions, 1 deletions
diff --git a/libavformat/Makefile b/libavformat/Makefile index 15f7d07b6e..256edeccc7 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -14,7 +14,7 @@ PPOBJS= # mux and demuxes OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o raw.o rm.o \ avienc.o avidec.o wav.o swf.o au.o gif.o mov.o mpjpeg.o dvcore.o dv.o \ - yuv4mpeg.o 4xm.o flvenc.o flvdec.o movenc.o psxstr.o + yuv4mpeg.o 4xm.o flvenc.o flvdec.o movenc.o psxstr.o idroq.o ipmovie.o ifeq ($(CONFIG_RISKY),yes) OBJS+= asf.o diff --git a/libavformat/allformats.c b/libavformat/allformats.c index 0fde3a2642..7496032647 100644 --- a/libavformat/allformats.c +++ b/libavformat/allformats.c @@ -52,6 +52,8 @@ void av_register_all(void) flvenc_init(); flvdec_init(); str_init(); + roq_init(); + ipmovie_init(); #ifdef AMR_NB amr_init(); diff --git a/libavformat/avformat.h b/libavformat/avformat.h index 30cc1a5ff8..6ade72fee1 100644 --- a/libavformat/avformat.h +++ b/libavformat/avformat.h @@ -383,6 +383,12 @@ int fourxm_init(void); /* psxstr.c */ int str_init(void); +/* idroq.c */ +int roq_init(void); + +/* ipmovie.c */ +int ipmovie_init(void); + #include "rtp.h" #include "rtsp.h" diff --git a/libavformat/idroq.c b/libavformat/idroq.c new file mode 100644 index 0000000000..15c6d55131 --- /dev/null +++ b/libavformat/idroq.c @@ -0,0 +1,299 @@ +/* + * Id RoQ (.roq) File Demuxer + * Copyright (c) 2003 The ffmpeg Project + * + * This library 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 of the License, or (at your option) any later version. + * + * This library 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 this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/** + * @file idroq.c + * Id RoQ format file demuxer + * by Mike Melanson (melanson@pcisys.net) + * for more information on the .roq file format, visit: + * http://www.csse.monash.edu.au/~timf/ + */ + +#include "avformat.h" + +#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0]) +#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \ + (((uint8_t*)(x))[2] << 16) | \ + (((uint8_t*)(x))[1] << 8) | \ + ((uint8_t*)(x))[0]) + +#define RoQ_MAGIC_NUMBER 0x1084 +#define RoQ_CHUNK_PREAMBLE_SIZE 8 +#define RoQ_AUDIO_SAMPLE_RATE 22050 +#define RoQ_CHUNKS_TO_SCAN 30 + +#define RoQ_INFO 0x1001 +#define RoQ_QUAD_CODEBOOK 0x1002 +#define RoQ_QUAD_VQ 0x1011 +#define RoQ_SOUND_MONO 0x1020 +#define RoQ_SOUND_STEREO 0x1021 + +typedef struct RoqDemuxContext { + + int width; + int height; + int audio_channels; + int framerate; + int frame_pts_inc; + + int video_stream_index; + int audio_stream_index; + + int64_t video_pts; + unsigned int audio_frame_count; + +} RoqDemuxContext; + +static int roq_probe(AVProbeData *p) +{ + if ((LE_16(&p->buf[0]) != RoQ_MAGIC_NUMBER) || + (LE_32(&p->buf[2]) != 0xFFFFFFFF)) + return 0; + + return AVPROBE_SCORE_MAX; +} + +static int roq_read_header(AVFormatContext *s, + AVFormatParameters *ap) +{ + RoqDemuxContext *roq = s->priv_data; + ByteIOContext *pb = &s->pb; + AVStream *st; + unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE]; + int i; + unsigned int chunk_size; + unsigned int chunk_type; + + /* get the main header */ + if (get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != + RoQ_CHUNK_PREAMBLE_SIZE) + return AVERROR_IO; + roq->framerate = LE_16(&preamble[6]); + roq->frame_pts_inc = 90000 / roq->framerate; + + /* set the pts reference (1 pts = 1/90000) */ + s->pts_num = 1; + s->pts_den = 90000; + + /* init private context parameters */ + roq->width = roq->height = roq->audio_channels = roq->video_pts = + roq->audio_frame_count = 0; + + /* scan the first n chunks searching for A/V parameters */ + for (i = 0; i < RoQ_CHUNKS_TO_SCAN; i++) { + if (get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != + RoQ_CHUNK_PREAMBLE_SIZE) + return AVERROR_IO; + + chunk_type = LE_16(&preamble[0]); + chunk_size = LE_32(&preamble[2]); + + switch (chunk_type) { + + case RoQ_INFO: + /* fetch the width and height; reuse the preamble bytes */ + if (get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != + RoQ_CHUNK_PREAMBLE_SIZE) + return AVERROR_IO; + roq->width = LE_16(&preamble[0]); + roq->height = LE_16(&preamble[2]); + break; + + case RoQ_QUAD_CODEBOOK: + case RoQ_QUAD_VQ: + /* ignore during this scan */ + url_fseek(pb, chunk_size, SEEK_CUR); + break; + + case RoQ_SOUND_MONO: + roq->audio_channels = 1; + url_fseek(pb, chunk_size, SEEK_CUR); + break; + + case RoQ_SOUND_STEREO: + roq->audio_channels = 2; + url_fseek(pb, chunk_size, SEEK_CUR); + break; + + default: + printf (" unknown RoQ chunk type (%04X)\n", LE_16(&preamble[0])); + return AVERROR_INVALIDDATA; + break; + } + + /* if all necessary parameters have been gathered, exit early */ + if ((roq->width && roq->height) && roq->audio_channels) + break; + } + + /* seek back to the first chunk */ + url_fseek(pb, RoQ_CHUNK_PREAMBLE_SIZE, SEEK_SET); + + /* initialize the decoders */ + st = av_new_stream(s, 0); + if (!st) + return AVERROR_NOMEM; + roq->video_stream_index = st->index; + st->codec.codec_type = CODEC_TYPE_VIDEO; + st->codec.codec_id = CODEC_ID_ROQ; + st->codec.codec_tag = 0; /* no fourcc */ + st->codec.width = roq->width; + st->codec.height = roq->height; + + if (roq->audio_channels) { + st = av_new_stream(s, 0); + if (!st) + return AVERROR_NOMEM; + roq->audio_stream_index = st->index; + st->codec.codec_type = CODEC_TYPE_AUDIO; + st->codec.codec_id = CODEC_ID_ROQ_DPCM; + st->codec.codec_tag = 0; /* no tag */ + st->codec.channels = roq->audio_channels; + st->codec.sample_rate = RoQ_AUDIO_SAMPLE_RATE; + st->codec.bits_per_sample = 16; + st->codec.bit_rate = st->codec.channels * st->codec.sample_rate * + st->codec.bits_per_sample; + st->codec.block_align = st->codec.channels * st->codec.bits_per_sample; + } +printf (" video is %d x %d, audio is %d channels\n", + roq->width, roq->height, roq->audio_channels); + + return 0; +} + +static int roq_read_packet(AVFormatContext *s, + AVPacket *pkt) +{ + RoqDemuxContext *roq = s->priv_data; + ByteIOContext *pb = &s->pb; + int ret = 0; + unsigned int chunk_size; + unsigned int chunk_type; + unsigned int codebook_size; + unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE]; + int packet_read = 0; + offset_t codebook_offset; + + while (!packet_read) { + + if (url_feof(&s->pb)) + return -EIO; + + /* get the next chunk preamble */ + if ((ret = get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE)) != + RoQ_CHUNK_PREAMBLE_SIZE) + return -EIO; + + chunk_type = LE_16(&preamble[0]); + chunk_size = LE_32(&preamble[2]); + + switch (chunk_type) { + + case RoQ_INFO: + /* don't care about this chunk anymore */ + url_fseek(pb, RoQ_CHUNK_PREAMBLE_SIZE, SEEK_CUR); + break; + + case RoQ_QUAD_CODEBOOK: + /* packet needs to contain both this codebook and next VQ chunk */ + codebook_offset = url_ftell(pb) - RoQ_CHUNK_PREAMBLE_SIZE; + codebook_size = chunk_size; + url_fseek(pb, codebook_size, SEEK_CUR); + if (get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != + RoQ_CHUNK_PREAMBLE_SIZE) + return -EIO; + chunk_size = LE_32(&preamble[2]) + RoQ_CHUNK_PREAMBLE_SIZE * 2 + + codebook_size; + + /* rewind */ + url_fseek(pb, codebook_offset, SEEK_SET); + + /* load up the packet */ + if (av_new_packet(pkt, chunk_size)) + return -EIO; + pkt->stream_index = roq->video_stream_index; + pkt->pts = roq->video_pts; + ret = get_buffer(pb, pkt->data, chunk_size); + if (ret != chunk_size) + ret = -EIO; + + roq->video_pts += roq->frame_pts_inc; + packet_read = 1; + break; + + case RoQ_SOUND_MONO: + case RoQ_SOUND_STEREO: + case RoQ_QUAD_VQ: + /* load up the packet */ + if (av_new_packet(pkt, chunk_size + RoQ_CHUNK_PREAMBLE_SIZE)) + return -EIO; + /* copy over preamble */ + memcpy(pkt->data, preamble, RoQ_CHUNK_PREAMBLE_SIZE); + + if (chunk_type == RoQ_QUAD_VQ) { + pkt->stream_index = roq->video_stream_index; + pkt->pts = roq->video_pts; + roq->video_pts += roq->frame_pts_inc; + } else { + pkt->stream_index = roq->audio_stream_index; + pkt->pts = roq->audio_frame_count; + pkt->pts *= 90000; + pkt->pts /= RoQ_AUDIO_SAMPLE_RATE; + roq->audio_frame_count += (chunk_size / roq->audio_channels); + } + + ret = get_buffer(pb, pkt->data, chunk_size); + if (ret != chunk_size) + ret = -EIO; + + packet_read = 1; + break; + + default: + printf (" unknown RoQ chunk (%04X)\n", chunk_type); + return AVERROR_INVALIDDATA; + break; + } + } + + return ret; +} + +static int roq_read_close(AVFormatContext *s) +{ +// RoqDemuxContext *roq = (RoqDemuxContext *)s->priv_data; + + return 0; +} + +static AVInputFormat roq_iformat = { + "RoQ", + "Id RoQ format", + sizeof(RoqDemuxContext), + roq_probe, + roq_read_header, + roq_read_packet, + roq_read_close, +}; + +int roq_init(void) +{ + av_register_input_format(&roq_iformat); + return 0; +} diff --git a/libavformat/ipmovie.c b/libavformat/ipmovie.c new file mode 100644 index 0000000000..ce37dedf06 --- /dev/null +++ b/libavformat/ipmovie.c @@ -0,0 +1,618 @@ +/* + * Interplay MVE File Demuxer + * Copyright (c) 2003 The ffmpeg Project + * + * This library 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 of the License, or (at your option) any later version. + * + * This library 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 this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/** + * @file ipmovie.c + * Interplay MVE file demuxer + * by Mike Melanson (melanson@pcisys.net) + * For more information regarding the Interplay MVE file format, visit: + * http://www.pcisys.net/~melanson/codecs/ + * The aforementioned site also contains a command line utility for parsing + * IP MVE files so that you can get a good idea of the typical structure of + * such files. This demuxer is not the best example to use if you are trying + * to write your own as it uses a rather roundabout approach for splitting + * up and sending out the chunks. + */ + +#include "avformat.h" + +/* debugging support: #define DEBUG_IPMOVIE as non-zero to see extremely + * verbose information about the demux process */ +#define DEBUG_IPMOVIE 0 + +#if DEBUG_IPMOVIE +#define debug_ipmovie printf +#else +static inline void debug_ipmovie(const char *format, ...) { } +#endif + + +#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0]) +#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \ + (((uint8_t*)(x))[2] << 16) | \ + (((uint8_t*)(x))[1] << 8) | \ + ((uint8_t*)(x))[0]) + +#define IPMOVIE_SIGNATURE "Interplay MVE File\x1A\0" +#define IPMOVIE_SIGNATURE_SIZE 20 +#define CHUNK_PREAMBLE_SIZE 4 +#define OPCODE_PREAMBLE_SIZE 4 + +#define CHUNK_INIT_AUDIO 0x0000 +#define CHUNK_AUDIO_ONLY 0x0001 +#define CHUNK_INIT_VIDEO 0x0002 +#define CHUNK_VIDEO 0x0003 +#define CHUNK_SHUTDOWN 0x0004 +#define CHUNK_END 0x0005 +/* these last types are used internally */ +#define CHUNK_DONE 0xFFFC +#define CHUNK_NOMEM 0xFFFD +#define CHUNK_EOF 0xFFFE +#define CHUNK_BAD 0xFFFF + +#define OPCODE_END_OF_STREAM 0x00 +#define OPCODE_END_OF_CHUNK 0x01 +#define OPCODE_CREATE_TIMER 0x02 +#define OPCODE_INIT_AUDIO_BUFFERS 0x03 +#define OPCODE_START_STOP_AUDIO 0x04 +#define OPCODE_INIT_VIDEO_BUFFERS 0x05 +#define OPCODE_UNKNOWN_06 0x06 +#define OPCODE_SEND_BUFFER 0x07 +#define OPCODE_AUDIO_FRAME 0x08 +#define OPCODE_SILENCE_FRAME 0x09 +#define OPCODE_INIT_VIDEO_MODE 0x0A +#define OPCODE_CREATE_GRADIENT 0x0B +#define OPCODE_SET_PALETTE 0x0C +#define OPCODE_SET_PALETTE_COMPRESSED 0x0D +#define OPCODE_UNKNOWN_0E 0x0E +#define OPCODE_SET_DECODING_MAP 0x0F +#define OPCODE_UNKNOWN_10 0x10 +#define OPCODE_VIDEO_DATA 0x11 +#define OPCODE_UNKNOWN_12 0x12 +#define OPCODE_UNKNOWN_13 0x13 +#define OPCODE_UNKNOWN_14 0x14 +#define OPCODE_UNKNOWN_15 0x15 + +#define PALETTE_COUNT 256 + +typedef struct IPMVEContext { + + unsigned char *buf; + int buf_size; + + int fps; + int frame_pts_inc; + + unsigned int video_width; + unsigned int video_height; + int64_t video_pts; + + unsigned int audio_bits; + unsigned int audio_channels; + unsigned int audio_sample_rate; + unsigned int audio_type; + unsigned int audio_frame_count; + + int video_stream_index; + int audio_stream_index; + + offset_t audio_chunk_offset; + int audio_chunk_size; + offset_t video_chunk_offset; + int video_chunk_size; + offset_t decode_map_chunk_offset; + int decode_map_chunk_size; + + offset_t next_chunk_offset; + +} IPMVEContext; + +static int load_ipmovie_packet(IPMVEContext *s, ByteIOContext *pb, + AVPacket *pkt) { + + int chunk_type; + int64_t audio_pts = 0; + + if (s->audio_chunk_offset) { + + url_fseek(pb, s->audio_chunk_offset, SEEK_SET); + s->audio_chunk_offset = 0; + + /* figure out the audio pts */ + audio_pts = 90000; + audio_pts *= s->audio_frame_count; + audio_pts /= s->audio_sample_rate; + + if (av_new_packet(pkt, s->audio_chunk_size)) + return CHUNK_NOMEM; + + pkt->stream_index = s->audio_stream_index; + pkt->pts = audio_pts; + if (get_buffer(pb, pkt->data, s->audio_chunk_size) != + s->audio_chunk_size) { + av_free_packet(pkt); + return CHUNK_EOF; + } + + /* audio frame maintenance */ + if (s->audio_type != CODEC_ID_INTERPLAY_DPCM) + s->audio_frame_count += + (s->audio_chunk_size / s->audio_channels / (s->audio_bits / 8)); + else + s->audio_frame_count += + (s->audio_chunk_size - 6) / s->audio_channels; + + debug_ipmovie("sending audio frame with pts %lld (%d audio frames)\n", + audio_pts, s->audio_frame_count); + + chunk_type = CHUNK_VIDEO; + + } else if (s->decode_map_chunk_offset) { + + url_fseek(pb, s->decode_map_chunk_offset, SEEK_SET); + s->decode_map_chunk_offset = 0; + + if (av_new_packet(pkt, s->decode_map_chunk_size)) + return CHUNK_NOMEM; + + pkt->stream_index = s->video_stream_index; + pkt->pts = s->video_pts; + if (get_buffer(pb, pkt->data, s->decode_map_chunk_size) != + s->decode_map_chunk_size) { + av_free_packet(pkt); + return CHUNK_EOF; + } + + chunk_type = CHUNK_VIDEO; + + } else if (s->video_chunk_offset) { + + url_fseek(pb, s->video_chunk_offset, SEEK_SET); + s->video_chunk_offset = 0; + + if (av_new_packet(pkt, s->video_chunk_size)) + return CHUNK_NOMEM; + + pkt->stream_index = s->video_stream_index; + pkt->pts = s->video_pts; + if (get_buffer(pb, pkt->data, s->video_chunk_size) != + s->video_chunk_size) { + av_free_packet(pkt); + return CHUNK_EOF; + } + + s->video_pts += s->frame_pts_inc; + + chunk_type = CHUNK_VIDEO; + + } else { + + url_fseek(pb, s->next_chunk_offset, SEEK_SET); + chunk_type = CHUNK_DONE; + + } + + return chunk_type; +} + +/* This function loads and processes a single chunk in an IP movie file. + * It returns the type of chunk that was processed. */ +static int process_ipmovie_chunk(IPMVEContext *s, ByteIOContext *pb, + AVPacket *pkt) +{ + unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE]; + int chunk_type; + int chunk_size; + unsigned char opcode_preamble[OPCODE_PREAMBLE_SIZE]; + unsigned char opcode_type; + unsigned char opcode_version; + int opcode_size; + unsigned char scratch[1024]; + int j; + int first_color, last_color; + int audio_flags; + + /* see if there are any pending packets */ + chunk_type = load_ipmovie_packet(s, pb, pkt); + if ((chunk_type == CHUNK_VIDEO) && (chunk_type != CHUNK_DONE)) + return chunk_type; + + /* read the next chunk, wherever the file happens to be pointing */ + if (url_feof(pb)) + return CHUNK_EOF; + if (get_buffer(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) != + CHUNK_PREAMBLE_SIZE) + return CHUNK_BAD; + chunk_size = LE_16(&chunk_preamble[0]); + chunk_type = LE_16(&chunk_preamble[2]); + + debug_ipmovie("chunk type 0x%04X, 0x%04X bytes: ", chunk_type, chunk_size); + + switch (chunk_type) { + + case CHUNK_INIT_AUDIO: + debug_ipmovie("initialize audio\n"); + break; + + case CHUNK_AUDIO_ONLY: + debug_ipmovie("audio only\n"); + break; + + case CHUNK_INIT_VIDEO: + debug_ipmovie("initialize video\n"); + break; + + case CHUNK_VIDEO: + debug_ipmovie("video (and audio)\n"); + break; + + case CHUNK_SHUTDOWN: + debug_ipmovie("shutdown\n"); + break; + + case CHUNK_END: + debug_ipmovie("end\n"); + break; + + default: + debug_ipmovie("invalid chunk\n"); + chunk_type = CHUNK_BAD; + break; + + } + + while ((chunk_size > 0) && (chunk_type != CHUNK_BAD)) { + + /* read the next chunk, wherever the file happens to be pointing */ + if (url_feof(pb)) { + chunk_type = CHUNK_EOF; + break; + } + if (get_buffer(pb, opcode_preamble, CHUNK_PREAMBLE_SIZE) != + CHUNK_PREAMBLE_SIZE) { + chunk_type = CHUNK_BAD; + break; + } + + opcode_size = LE_16(&opcode_preamble[0]); + opcode_type = opcode_preamble[2]; + opcode_version = opcode_preamble[3]; + + chunk_size -= OPCODE_PREAMBLE_SIZE; + chunk_size -= opcode_size; + if (chunk_size < 0) { + debug_ipmovie("chunk_size countdown just went negative\n"); + chunk_type = CHUNK_BAD; + break; + } + + debug_ipmovie(" opcode type %02X, version %d, 0x%04X bytes: ", + opcode_type, opcode_version, opcode_size); + switch (opcode_type) { + + case OPCODE_END_OF_STREAM: + debug_ipmovie("end of stream\n"); + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + case OPCODE_END_OF_CHUNK: + debug_ipmovie("end of chunk\n"); + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + case OPCODE_CREATE_TIMER: + debug_ipmovie("create timer\n"); + if ((opcode_version > 0) || (opcode_size > 6)) { + debug_ipmovie("bad create_timer opcode\n"); + chunk_type = CHUNK_BAD; + break; + } + if (get_buffer(pb, scratch, opcode_size) != + opcode_size) { + chunk_type = CHUNK_BAD; + break; + } + s->fps = 1000000 / (LE_32(&scratch[0]) * LE_16(&scratch[4])); + s->fps++; /* above calculation usually yields 14.9; we need 15 */ + s->frame_pts_inc = 90000 / s->fps; + debug_ipmovie("%d frames/second (timer div = %d, subdiv = %d)\n", + s->fps, LE_32(&scratch[0]), LE_16(&scratch[4])); + break; + + case OPCODE_INIT_AUDIO_BUFFERS: + debug_ipmovie("initialize audio buffers\n"); + if ((opcode_version > 1) || (opcode_size > 10)) { + debug_ipmovie("bad init_audio_buffers opcode\n"); + chunk_type = CHUNK_BAD; + break; + } + if (get_buffer(pb, scratch, opcode_size) != + opcode_size) { + chunk_type = CHUNK_BAD; + break; + } + s->audio_sample_rate = LE_16(&scratch[4]); + audio_flags = LE_16(&scratch[2]); + /* bit 0 of the flags: 0 = mono, 1 = stereo */ + s->audio_channels = (audio_flags & 1) + 1; + /* bit 1 of the flags: 0 = 8 bit, 1 = 16 bit */ + s->audio_bits = (((audio_flags >> 1) & 1) + 1) * 8; + /* bit 2 indicates compressed audio in version 1 opcode */ + if ((opcode_version == 1) && (audio_flags & 0x4)) + s->audio_type = CODEC_ID_INTERPLAY_DPCM; + else if (s->audio_bits == 16) + s->audio_type = CODEC_ID_PCM_S16LE; + else + s->audio_type = CODEC_ID_PCM_U8; + debug_ipmovie("audio: %d bits, %d Hz, %s, %s format\n", + s->audio_bits, + s->audio_sample_rate, + (s->audio_channels == 2) ? "stereo" : "mono", + (s->audio_type == CODEC_ID_INTERPLAY_DPCM) ? + "Interplay audio" : "PCM"); + break; + + case OPCODE_START_STOP_AUDIO: + debug_ipmovie("start/stop audio\n"); + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + case OPCODE_INIT_VIDEO_BUFFERS: + debug_ipmovie("initialize video buffers\n"); + if ((opcode_version > 2) || (opcode_size > 8)) { + debug_ipmovie("bad init_video_buffers opcode\n"); + chunk_type = CHUNK_BAD; + break; + } + if (get_buffer(pb, scratch, opcode_size) != + opcode_size) { + chunk_type = CHUNK_BAD; + break; + } + s->video_width = LE_16(&scratch[0]) * 8; + s->video_height = LE_16(&scratch[2]) * 8; + debug_ipmovie("video resolution: %d x %d\n", + s->video_width, s->video_height); + break; + + case OPCODE_UNKNOWN_06: + case OPCODE_UNKNOWN_0E: + case OPCODE_UNKNOWN_10: + case OPCODE_UNKNOWN_12: + case OPCODE_UNKNOWN_13: + case OPCODE_UNKNOWN_14: + case OPCODE_UNKNOWN_15: + debug_ipmovie("unknown (but documented) opcode %02X\n", opcode_type); + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + case OPCODE_SEND_BUFFER: + debug_ipmovie("send buffer\n"); + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + case OPCODE_AUDIO_FRAME: + debug_ipmovie("audio frame\n"); + + /* log position and move on for now */ + s->audio_chunk_offset = url_ftell(pb); + s->audio_chunk_size = opcode_size; + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + case OPCODE_SILENCE_FRAME: + debug_ipmovie("silence frame\n"); + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + case OPCODE_INIT_VIDEO_MODE: + debug_ipmovie("initialize video mode\n"); + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + case OPCODE_CREATE_GRADIENT: + debug_ipmovie("create gradient\n"); + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + case OPCODE_SET_PALETTE: + debug_ipmovie("set palette\n"); + /* check for the logical maximum palette size + * (3 * 256 + 4 bytes) */ + if (opcode_size > 0x304) { + debug_ipmovie("demux_ipmovie: set_palette opcode too large\n"); + chunk_type = CHUNK_BAD; + break; + } + if (get_buffer(pb, scratch, opcode_size) != opcode_size) { + chunk_type = CHUNK_BAD; + break; + } + + /* load the palette into internal data structure */ + first_color = LE_16(&scratch[0]); + last_color = LE_16(&scratch[2]); + /* sanity check (since they are 16 bit values) */ + if ((first_color > 0xFF) || (last_color > 0xFF)) { + debug_ipmovie("demux_ipmovie: set_palette indices out of range (%d -> %d)\n", + first_color, last_color); + chunk_type = CHUNK_BAD; + break; + } + j = 4; /* offset of first palette data */ +#if 0 + for (i = first_color; i <= last_color; i++) { + s->palette[i].r = scratch[j++] * 4; + s->palette[i].g = scratch[j++] * 4; + s->palette[i].b = scratch[j++] * 4; + } +#endif + break; + + case OPCODE_SET_PALETTE_COMPRESSED: + debug_ipmovie("set palette compressed\n"); + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + case OPCODE_SET_DECODING_MAP: + debug_ipmovie("set decoding map\n"); + + /* log position and move on for now */ + s->decode_map_chunk_offset = url_ftell(pb); + s->decode_map_chunk_size = opcode_size; + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + case OPCODE_VIDEO_DATA: + debug_ipmovie("set video data\n"); + + /* log position and move on for now */ + s->video_chunk_offset = url_ftell(pb); + s->video_chunk_size = opcode_size; + url_fseek(pb, opcode_size, SEEK_CUR); + break; + + default: + debug_ipmovie("*** unknown opcode type\n"); + chunk_type = CHUNK_BAD; + break; + + } + } + + /* make a note of where the stream is sitting */ + s->next_chunk_offset = url_ftell(pb); + + /* dispatch the first of any pending packets */ + if ((chunk_type == CHUNK_VIDEO) || (chunk_type == CHUNK_AUDIO_ONLY)) + chunk_type = load_ipmovie_packet(s, pb, pkt); + + return chunk_type; +} + +static int ipmovie_probe(AVProbeData *p) +{ + if (p->buf_size < IPMOVIE_SIGNATURE_SIZE) + return 0; + if (strncmp(p->buf, IPMOVIE_SIGNATURE, IPMOVIE_SIGNATURE_SIZE) != 0) + return 0; + + return AVPROBE_SCORE_MAX; +} + +static int ipmovie_read_header(AVFormatContext *s, + AVFormatParameters *ap) +{ + IPMVEContext *ipmovie = (IPMVEContext *)s->priv_data; + ByteIOContext *pb = &s->pb; + AVPacket pkt; + AVStream *st; + + /* initialize private context members */ + ipmovie->video_pts = ipmovie->audio_frame_count = 0; + ipmovie->audio_chunk_offset = ipmovie->video_chunk_offset = + ipmovie->decode_map_chunk_offset = 0; + + /* on the first read, this will position the stream at the first chunk */ + ipmovie->next_chunk_offset = IPMOVIE_SIGNATURE_SIZE + 6; + + /* process the first chunk which should be CHUNK_INIT_VIDEO */ + if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_VIDEO) + return AVERROR_INVALIDDATA; + + /* process the next chunk which should be CHUNK_INIT_AUDIO */ + if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_AUDIO) + return AVERROR_INVALIDDATA; + + /* set the pts reference (1 pts = 1/90000) */ + s->pts_num = 1; + s->pts_den = 90000; + + /* initialize the stream decoders */ + st = av_new_stream(s, 0); + if (!st) + return AVERROR_NOMEM; + ipmovie->video_stream_index = st->index; + st->codec.codec_type = CODEC_TYPE_VIDEO; + st->codec.codec_id = CODEC_ID_INTERPLAY_VIDEO; + st->codec.codec_tag = 0; /* no fourcc */ + st->codec.width = ipmovie->video_width; + st->codec.height = ipmovie->video_height; + + st = av_new_stream(s, 0); + if (!st) + return AVERROR_NOMEM; + ipmovie->audio_stream_index = st->index; + st->codec.codec_type = CODEC_TYPE_AUDIO; + st->codec.codec_id = ipmovie->audio_type; + st->codec.codec_tag = 0; /* no tag */ + st->codec.channels = ipmovie->audio_channels; + st->codec.sample_rate = ipmovie->audio_sample_rate; + st->codec.bits_per_sample = ipmovie->audio_bits; + st->codec.bit_rate = st->codec.channels * st->codec.sample_rate * + st->codec.bits_per_sample / + (st->codec.codec_id == CODEC_ID_INTERPLAY_DPCM) ? 2 : 1; + st->codec.block_align = st->codec.channels * st->codec.bits_per_sample; + + return 0; +} + +static int ipmovie_read_packet(AVFormatContext *s, + AVPacket *pkt) +{ + IPMVEContext *ipmovie = (IPMVEContext *)s->priv_data; + ByteIOContext *pb = &s->pb; + int ret; + + ret = process_ipmovie_chunk(ipmovie, pb, pkt); + if (ret == CHUNK_BAD) + ret = AVERROR_INVALIDDATA; + else if (ret == CHUNK_EOF) + ret = -EIO; + else if (ret == CHUNK_NOMEM) + ret = AVERROR_NOMEM; + else + ret = 0; + + return ret; +} + +static int ipmovie_read_close(AVFormatContext *s) +{ +// IPMVEContext *ipmovie = (IPMVEContext *)s->priv_data; + + return 0; +} + +static AVInputFormat ipmovie_iformat = { + "ipmovie", + "Interplay MVE format", + sizeof(IPMVEContext), + ipmovie_probe, + ipmovie_read_header, + ipmovie_read_packet, + ipmovie_read_close, +}; + +int ipmovie_init(void) +{ + av_register_input_format(&ipmovie_iformat); + return 0; +} + |