| /* |
| * "Real" compatible mux and demux. |
| * Copyright (c) 2000, 2001 Fabrice Bellard. |
| * |
| * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #include "avformat.h" |
| |
| /* in ms */ |
| #define BUFFER_DURATION 0 |
| |
| typedef struct { |
| int nb_packets; |
| int packet_total_size; |
| int packet_max_size; |
| /* codec related output */ |
| int bit_rate; |
| float frame_rate; |
| int nb_frames; /* current frame number */ |
| int total_frames; /* total number of frames */ |
| int num; |
| AVCodecContext *enc; |
| } StreamInfo; |
| |
| typedef struct { |
| StreamInfo streams[2]; |
| StreamInfo *audio_stream, *video_stream; |
| int data_pos; /* position of the data after the header */ |
| int nb_packets; |
| int old_format; |
| int current_stream; |
| int remaining_len; |
| /// Audio descrambling matrix parameters |
| uint8_t *audiobuf; ///< place to store reordered audio data |
| int64_t audiotimestamp; ///< Audio packet timestamp |
| int sub_packet_cnt; // Subpacket counter, used while reading |
| int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container |
| int audio_stream_num; ///< Stream number for audio packets |
| int audio_pkt_cnt; ///< Output packet counter |
| int audio_framesize; /// Audio frame size from container |
| } RMContext; |
| |
| #ifdef CONFIG_MUXERS |
| static void put_str(ByteIOContext *s, const char *tag) |
| { |
| put_be16(s,strlen(tag)); |
| while (*tag) { |
| put_byte(s, *tag++); |
| } |
| } |
| |
| static void put_str8(ByteIOContext *s, const char *tag) |
| { |
| put_byte(s, strlen(tag)); |
| while (*tag) { |
| put_byte(s, *tag++); |
| } |
| } |
| |
| static void rv10_write_header(AVFormatContext *ctx, |
| int data_size, int index_pos) |
| { |
| RMContext *rm = ctx->priv_data; |
| ByteIOContext *s = &ctx->pb; |
| StreamInfo *stream; |
| unsigned char *data_offset_ptr, *start_ptr; |
| const char *desc, *mimetype; |
| int nb_packets, packet_total_size, packet_max_size, size, packet_avg_size, i; |
| int bit_rate, v, duration, flags, data_pos; |
| |
| start_ptr = s->buf_ptr; |
| |
| put_tag(s, ".RMF"); |
| put_be32(s,18); /* header size */ |
| put_be16(s,0); |
| put_be32(s,0); |
| put_be32(s,4 + ctx->nb_streams); /* num headers */ |
| |
| put_tag(s,"PROP"); |
| put_be32(s, 50); |
| put_be16(s, 0); |
| packet_max_size = 0; |
| packet_total_size = 0; |
| nb_packets = 0; |
| bit_rate = 0; |
| duration = 0; |
| for(i=0;i<ctx->nb_streams;i++) { |
| StreamInfo *stream = &rm->streams[i]; |
| bit_rate += stream->bit_rate; |
| if (stream->packet_max_size > packet_max_size) |
| packet_max_size = stream->packet_max_size; |
| nb_packets += stream->nb_packets; |
| packet_total_size += stream->packet_total_size; |
| /* select maximum duration */ |
| v = (int) (1000.0 * (float)stream->total_frames / stream->frame_rate); |
| if (v > duration) |
| duration = v; |
| } |
| put_be32(s, bit_rate); /* max bit rate */ |
| put_be32(s, bit_rate); /* avg bit rate */ |
| put_be32(s, packet_max_size); /* max packet size */ |
| if (nb_packets > 0) |
| packet_avg_size = packet_total_size / nb_packets; |
| else |
| packet_avg_size = 0; |
| put_be32(s, packet_avg_size); /* avg packet size */ |
| put_be32(s, nb_packets); /* num packets */ |
| put_be32(s, duration); /* duration */ |
| put_be32(s, BUFFER_DURATION); /* preroll */ |
| put_be32(s, index_pos); /* index offset */ |
| /* computation of data the data offset */ |
| data_offset_ptr = s->buf_ptr; |
| put_be32(s, 0); /* data offset : will be patched after */ |
| put_be16(s, ctx->nb_streams); /* num streams */ |
| flags = 1 | 2; /* save allowed & perfect play */ |
| if (url_is_streamed(s)) |
| flags |= 4; /* live broadcast */ |
| put_be16(s, flags); |
| |
| /* comments */ |
| |
| put_tag(s,"CONT"); |
| size = strlen(ctx->title) + strlen(ctx->author) + strlen(ctx->copyright) + |
| strlen(ctx->comment) + 4 * 2 + 10; |
| put_be32(s,size); |
| put_be16(s,0); |
| put_str(s, ctx->title); |
| put_str(s, ctx->author); |
| put_str(s, ctx->copyright); |
| put_str(s, ctx->comment); |
| |
| for(i=0;i<ctx->nb_streams;i++) { |
| int codec_data_size; |
| |
| stream = &rm->streams[i]; |
| |
| if (stream->enc->codec_type == CODEC_TYPE_AUDIO) { |
| desc = "The Audio Stream"; |
| mimetype = "audio/x-pn-realaudio"; |
| codec_data_size = 73; |
| } else { |
| desc = "The Video Stream"; |
| mimetype = "video/x-pn-realvideo"; |
| codec_data_size = 34; |
| } |
| |
| put_tag(s,"MDPR"); |
| size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size; |
| put_be32(s, size); |
| put_be16(s, 0); |
| |
| put_be16(s, i); /* stream number */ |
| put_be32(s, stream->bit_rate); /* max bit rate */ |
| put_be32(s, stream->bit_rate); /* avg bit rate */ |
| put_be32(s, stream->packet_max_size); /* max packet size */ |
| if (stream->nb_packets > 0) |
| packet_avg_size = stream->packet_total_size / |
| stream->nb_packets; |
| else |
| packet_avg_size = 0; |
| put_be32(s, packet_avg_size); /* avg packet size */ |
| put_be32(s, 0); /* start time */ |
| put_be32(s, BUFFER_DURATION); /* preroll */ |
| /* duration */ |
| if (url_is_streamed(s) || !stream->total_frames) |
| put_be32(s, (int)(3600 * 1000)); |
| else |
| put_be32(s, (int)(stream->total_frames * 1000 / stream->frame_rate)); |
| put_str8(s, desc); |
| put_str8(s, mimetype); |
| put_be32(s, codec_data_size); |
| |
| if (stream->enc->codec_type == CODEC_TYPE_AUDIO) { |
| int coded_frame_size, fscode, sample_rate; |
| sample_rate = stream->enc->sample_rate; |
| coded_frame_size = (stream->enc->bit_rate * |
| stream->enc->frame_size) / (8 * sample_rate); |
| /* audio codec info */ |
| put_tag(s, ".ra"); |
| put_byte(s, 0xfd); |
| put_be32(s, 0x00040000); /* version */ |
| put_tag(s, ".ra4"); |
| put_be32(s, 0x01b53530); /* stream length */ |
| put_be16(s, 4); /* unknown */ |
| put_be32(s, 0x39); /* header size */ |
| |
| switch(sample_rate) { |
| case 48000: |
| case 24000: |
| case 12000: |
| fscode = 1; |
| break; |
| default: |
| case 44100: |
| case 22050: |
| case 11025: |
| fscode = 2; |
| break; |
| case 32000: |
| case 16000: |
| case 8000: |
| fscode = 3; |
| } |
| put_be16(s, fscode); /* codec additional info, for AC3, seems |
| to be a frequency code */ |
| /* special hack to compensate rounding errors... */ |
| if (coded_frame_size == 557) |
| coded_frame_size--; |
| put_be32(s, coded_frame_size); /* frame length */ |
| put_be32(s, 0x51540); /* unknown */ |
| put_be32(s, 0x249f0); /* unknown */ |
| put_be32(s, 0x249f0); /* unknown */ |
| put_be16(s, 0x01); |
| /* frame length : seems to be very important */ |
| put_be16(s, coded_frame_size); |
| put_be32(s, 0); /* unknown */ |
| put_be16(s, stream->enc->sample_rate); /* sample rate */ |
| put_be32(s, 0x10); /* unknown */ |
| put_be16(s, stream->enc->channels); |
| put_str8(s, "Int0"); /* codec name */ |
| put_str8(s, "dnet"); /* codec name */ |
| put_be16(s, 0); /* title length */ |
| put_be16(s, 0); /* author length */ |
| put_be16(s, 0); /* copyright length */ |
| put_byte(s, 0); /* end of header */ |
| } else { |
| /* video codec info */ |
| put_be32(s,34); /* size */ |
| if(stream->enc->codec_id == CODEC_ID_RV10) |
| put_tag(s,"VIDORV10"); |
| else |
| put_tag(s,"VIDORV20"); |
| put_be16(s, stream->enc->width); |
| put_be16(s, stream->enc->height); |
| put_be16(s, (int) stream->frame_rate); /* frames per seconds ? */ |
| put_be32(s,0); /* unknown meaning */ |
| put_be16(s, (int) stream->frame_rate); /* unknown meaning */ |
| put_be32(s,0); /* unknown meaning */ |
| put_be16(s, 8); /* unknown meaning */ |
| /* Seems to be the codec version: only use basic H263. The next |
| versions seems to add a diffential DC coding as in |
| MPEG... nothing new under the sun */ |
| if(stream->enc->codec_id == CODEC_ID_RV10) |
| put_be32(s,0x10000000); |
| else |
| put_be32(s,0x20103001); |
| //put_be32(s,0x10003000); |
| } |
| } |
| |
| /* patch data offset field */ |
| data_pos = s->buf_ptr - start_ptr; |
| rm->data_pos = data_pos; |
| data_offset_ptr[0] = data_pos >> 24; |
| data_offset_ptr[1] = data_pos >> 16; |
| data_offset_ptr[2] = data_pos >> 8; |
| data_offset_ptr[3] = data_pos; |
| |
| /* data stream */ |
| put_tag(s,"DATA"); |
| put_be32(s,data_size + 10 + 8); |
| put_be16(s,0); |
| |
| put_be32(s, nb_packets); /* number of packets */ |
| put_be32(s,0); /* next data header */ |
| } |
| |
| static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream, |
| int length, int key_frame) |
| { |
| int timestamp; |
| ByteIOContext *s = &ctx->pb; |
| |
| stream->nb_packets++; |
| stream->packet_total_size += length; |
| if (length > stream->packet_max_size) |
| stream->packet_max_size = length; |
| |
| put_be16(s,0); /* version */ |
| put_be16(s,length + 12); |
| put_be16(s, stream->num); /* stream number */ |
| timestamp = (1000 * (float)stream->nb_frames) / stream->frame_rate; |
| put_be32(s, timestamp); /* timestamp */ |
| put_byte(s, 0); /* reserved */ |
| put_byte(s, key_frame ? 2 : 0); /* flags */ |
| } |
| |
| static int rm_write_header(AVFormatContext *s) |
| { |
| RMContext *rm = s->priv_data; |
| StreamInfo *stream; |
| int n; |
| AVCodecContext *codec; |
| |
| for(n=0;n<s->nb_streams;n++) { |
| s->streams[n]->id = n; |
| codec = s->streams[n]->codec; |
| stream = &rm->streams[n]; |
| memset(stream, 0, sizeof(StreamInfo)); |
| stream->num = n; |
| stream->bit_rate = codec->bit_rate; |
| stream->enc = codec; |
| |
| switch(codec->codec_type) { |
| case CODEC_TYPE_AUDIO: |
| rm->audio_stream = stream; |
| stream->frame_rate = (float)codec->sample_rate / (float)codec->frame_size; |
| /* XXX: dummy values */ |
| stream->packet_max_size = 1024; |
| stream->nb_packets = 0; |
| stream->total_frames = stream->nb_packets; |
| break; |
| case CODEC_TYPE_VIDEO: |
| rm->video_stream = stream; |
| stream->frame_rate = (float)codec->time_base.den / (float)codec->time_base.num; |
| /* XXX: dummy values */ |
| stream->packet_max_size = 4096; |
| stream->nb_packets = 0; |
| stream->total_frames = stream->nb_packets; |
| break; |
| default: |
| return -1; |
| } |
| } |
| |
| rv10_write_header(s, 0, 0); |
| put_flush_packet(&s->pb); |
| return 0; |
| } |
| |
| static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size, int flags) |
| { |
| uint8_t *buf1; |
| RMContext *rm = s->priv_data; |
| ByteIOContext *pb = &s->pb; |
| StreamInfo *stream = rm->audio_stream; |
| int i; |
| |
| /* XXX: suppress this malloc */ |
| buf1= (uint8_t*) av_malloc( size * sizeof(uint8_t) ); |
| |
| write_packet_header(s, stream, size, !!(flags & PKT_FLAG_KEY)); |
| |
| /* for AC3, the words seems to be reversed */ |
| for(i=0;i<size;i+=2) { |
| buf1[i] = buf[i+1]; |
| buf1[i+1] = buf[i]; |
| } |
| put_buffer(pb, buf1, size); |
| put_flush_packet(pb); |
| stream->nb_frames++; |
| av_free(buf1); |
| return 0; |
| } |
| |
| static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size, int flags) |
| { |
| RMContext *rm = s->priv_data; |
| ByteIOContext *pb = &s->pb; |
| StreamInfo *stream = rm->video_stream; |
| int key_frame = !!(flags & PKT_FLAG_KEY); |
| |
| /* XXX: this is incorrect: should be a parameter */ |
| |
| /* Well, I spent some time finding the meaning of these bits. I am |
| not sure I understood everything, but it works !! */ |
| #if 1 |
| write_packet_header(s, stream, size + 7, key_frame); |
| /* bit 7: '1' if final packet of a frame converted in several packets */ |
| put_byte(pb, 0x81); |
| /* bit 7: '1' if I frame. bits 6..0 : sequence number in current |
| frame starting from 1 */ |
| if (key_frame) { |
| put_byte(pb, 0x81); |
| } else { |
| put_byte(pb, 0x01); |
| } |
| put_be16(pb, 0x4000 + (size)); /* total frame size */ |
| put_be16(pb, 0x4000 + (size)); /* offset from the start or the end */ |
| #else |
| /* full frame */ |
| write_packet_header(s, size + 6); |
| put_byte(pb, 0xc0); |
| put_be16(pb, 0x4000 + size); /* total frame size */ |
| put_be16(pb, 0x4000 + packet_number * 126); /* position in stream */ |
| #endif |
| put_byte(pb, stream->nb_frames & 0xff); |
| |
| put_buffer(pb, buf, size); |
| put_flush_packet(pb); |
| |
| stream->nb_frames++; |
| return 0; |
| } |
| |
| static int rm_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| if (s->streams[pkt->stream_index]->codec->codec_type == |
| CODEC_TYPE_AUDIO) |
| return rm_write_audio(s, pkt->data, pkt->size, pkt->flags); |
| else |
| return rm_write_video(s, pkt->data, pkt->size, pkt->flags); |
| } |
| |
| static int rm_write_trailer(AVFormatContext *s) |
| { |
| RMContext *rm = s->priv_data; |
| int data_size, index_pos, i; |
| ByteIOContext *pb = &s->pb; |
| |
| if (!url_is_streamed(&s->pb)) { |
| /* end of file: finish to write header */ |
| index_pos = url_fseek(pb, 0, SEEK_CUR); |
| data_size = index_pos - rm->data_pos; |
| |
| /* index */ |
| put_tag(pb, "INDX"); |
| put_be32(pb, 10 + 10 * s->nb_streams); |
| put_be16(pb, 0); |
| |
| for(i=0;i<s->nb_streams;i++) { |
| put_be32(pb, 0); /* zero indices */ |
| put_be16(pb, i); /* stream number */ |
| put_be32(pb, 0); /* next index */ |
| } |
| /* undocumented end header */ |
| put_be32(pb, 0); |
| put_be32(pb, 0); |
| |
| url_fseek(pb, 0, SEEK_SET); |
| for(i=0;i<s->nb_streams;i++) |
| rm->streams[i].total_frames = rm->streams[i].nb_frames; |
| rv10_write_header(s, data_size, index_pos); |
| } else { |
| /* undocumented end header */ |
| put_be32(pb, 0); |
| put_be32(pb, 0); |
| } |
| put_flush_packet(pb); |
| return 0; |
| } |
| #endif //CONFIG_MUXERS |
| |
| /***************************************************/ |
| |
| static void get_str(ByteIOContext *pb, char *buf, int buf_size) |
| { |
| int len, i; |
| char *q; |
| |
| len = get_be16(pb); |
| q = buf; |
| for(i=0;i<len;i++) { |
| if (i < buf_size - 1) |
| *q++ = get_byte(pb); |
| } |
| *q = '\0'; |
| } |
| |
| static void get_str8(ByteIOContext *pb, char *buf, int buf_size) |
| { |
| int len, i; |
| char *q; |
| |
| len = get_byte(pb); |
| q = buf; |
| for(i=0;i<len;i++) { |
| if (i < buf_size - 1) |
| *q++ = get_byte(pb); |
| } |
| *q = '\0'; |
| } |
| |
| static void rm_read_audio_stream_info(AVFormatContext *s, AVStream *st, |
| int read_all) |
| { |
| RMContext *rm = s->priv_data; |
| ByteIOContext *pb = &s->pb; |
| char buf[256]; |
| uint32_t version; |
| int i; |
| |
| /* ra type header */ |
| version = get_be32(pb); /* version */ |
| if (((version >> 16) & 0xff) == 3) { |
| int64_t startpos = url_ftell(pb); |
| /* very old version */ |
| for(i = 0; i < 14; i++) |
| get_byte(pb); |
| get_str8(pb, s->title, sizeof(s->title)); |
| get_str8(pb, s->author, sizeof(s->author)); |
| get_str8(pb, s->copyright, sizeof(s->copyright)); |
| get_str8(pb, s->comment, sizeof(s->comment)); |
| if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) { |
| // fourcc (should always be "lpcJ") |
| get_byte(pb); |
| get_str8(pb, buf, sizeof(buf)); |
| } |
| // Skip extra header crap (this should never happen) |
| if ((startpos + (version & 0xffff)) > url_ftell(pb)) |
| url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb)); |
| st->codec->sample_rate = 8000; |
| st->codec->channels = 1; |
| st->codec->codec_type = CODEC_TYPE_AUDIO; |
| st->codec->codec_id = CODEC_ID_RA_144; |
| } else { |
| int flavor, sub_packet_h, coded_framesize, sub_packet_size; |
| /* old version (4) */ |
| get_be32(pb); /* .ra4 */ |
| get_be32(pb); /* data size */ |
| get_be16(pb); /* version2 */ |
| get_be32(pb); /* header size */ |
| flavor= get_be16(pb); /* add codec info / flavor */ |
| rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */ |
| get_be32(pb); /* ??? */ |
| get_be32(pb); /* ??? */ |
| get_be32(pb); /* ??? */ |
| rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */ |
| st->codec->block_align= get_be16(pb); /* frame size */ |
| rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */ |
| get_be16(pb); /* ??? */ |
| if (((version >> 16) & 0xff) == 5) { |
| get_be16(pb); get_be16(pb); get_be16(pb); } |
| st->codec->sample_rate = get_be16(pb); |
| get_be32(pb); |
| st->codec->channels = get_be16(pb); |
| if (((version >> 16) & 0xff) == 5) { |
| get_be32(pb); |
| buf[0] = get_byte(pb); |
| buf[1] = get_byte(pb); |
| buf[2] = get_byte(pb); |
| buf[3] = get_byte(pb); |
| buf[4] = 0; |
| } else { |
| get_str8(pb, buf, sizeof(buf)); /* desc */ |
| get_str8(pb, buf, sizeof(buf)); /* desc */ |
| } |
| st->codec->codec_type = CODEC_TYPE_AUDIO; |
| if (!strcmp(buf, "dnet")) { |
| st->codec->codec_id = CODEC_ID_AC3; |
| } else if (!strcmp(buf, "28_8")) { |
| st->codec->codec_id = CODEC_ID_RA_288; |
| st->codec->extradata_size= 0; |
| rm->audio_framesize = st->codec->block_align; |
| st->codec->block_align = coded_framesize; |
| rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h); |
| } else if (!strcmp(buf, "cook")) { |
| int codecdata_length, i; |
| get_be16(pb); get_byte(pb); |
| if (((version >> 16) & 0xff) == 5) |
| get_byte(pb); |
| codecdata_length = get_be32(pb); |
| st->codec->codec_id = CODEC_ID_COOK; |
| st->codec->extradata_size= codecdata_length; |
| st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| for(i = 0; i < codecdata_length; i++) |
| ((uint8_t*)st->codec->extradata)[i] = get_byte(pb); |
| rm->audio_framesize = st->codec->block_align; |
| st->codec->block_align = rm->sub_packet_size; |
| rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h); |
| } else { |
| st->codec->codec_id = CODEC_ID_NONE; |
| pstrcpy(st->codec->codec_name, sizeof(st->codec->codec_name), |
| buf); |
| } |
| if (read_all) { |
| get_byte(pb); |
| get_byte(pb); |
| get_byte(pb); |
| |
| get_str8(pb, s->title, sizeof(s->title)); |
| get_str8(pb, s->author, sizeof(s->author)); |
| get_str8(pb, s->copyright, sizeof(s->copyright)); |
| get_str8(pb, s->comment, sizeof(s->comment)); |
| } |
| } |
| } |
| |
| static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap) |
| { |
| RMContext *rm = s->priv_data; |
| AVStream *st; |
| |
| rm->old_format = 1; |
| st = av_new_stream(s, 0); |
| if (!st) |
| goto fail; |
| rm_read_audio_stream_info(s, st, 1); |
| return 0; |
| fail: |
| return -1; |
| } |
| |
| static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap) |
| { |
| RMContext *rm = s->priv_data; |
| AVStream *st; |
| ByteIOContext *pb = &s->pb; |
| unsigned int tag, v; |
| int tag_size, size, codec_data_size, i; |
| int64_t codec_pos; |
| unsigned int h263_hack_version, start_time, duration; |
| char buf[128]; |
| int flags = 0; |
| |
| tag = get_le32(pb); |
| if (tag == MKTAG('.', 'r', 'a', 0xfd)) { |
| /* very old .ra format */ |
| return rm_read_header_old(s, ap); |
| } else if (tag != MKTAG('.', 'R', 'M', 'F')) { |
| return AVERROR_IO; |
| } |
| |
| get_be32(pb); /* header size */ |
| get_be16(pb); |
| get_be32(pb); |
| get_be32(pb); /* number of headers */ |
| |
| for(;;) { |
| if (url_feof(pb)) |
| goto fail; |
| tag = get_le32(pb); |
| tag_size = get_be32(pb); |
| get_be16(pb); |
| #if 0 |
| printf("tag=%c%c%c%c (%08x) size=%d\n", |
| (tag) & 0xff, |
| (tag >> 8) & 0xff, |
| (tag >> 16) & 0xff, |
| (tag >> 24) & 0xff, |
| tag, |
| tag_size); |
| #endif |
| if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A')) |
| goto fail; |
| switch(tag) { |
| case MKTAG('P', 'R', 'O', 'P'): |
| /* file header */ |
| get_be32(pb); /* max bit rate */ |
| get_be32(pb); /* avg bit rate */ |
| get_be32(pb); /* max packet size */ |
| get_be32(pb); /* avg packet size */ |
| get_be32(pb); /* nb packets */ |
| get_be32(pb); /* duration */ |
| get_be32(pb); /* preroll */ |
| get_be32(pb); /* index offset */ |
| get_be32(pb); /* data offset */ |
| get_be16(pb); /* nb streams */ |
| flags = get_be16(pb); /* flags */ |
| break; |
| case MKTAG('C', 'O', 'N', 'T'): |
| get_str(pb, s->title, sizeof(s->title)); |
| get_str(pb, s->author, sizeof(s->author)); |
| get_str(pb, s->copyright, sizeof(s->copyright)); |
| get_str(pb, s->comment, sizeof(s->comment)); |
| break; |
| case MKTAG('M', 'D', 'P', 'R'): |
| st = av_new_stream(s, 0); |
| if (!st) |
| goto fail; |
| st->id = get_be16(pb); |
| get_be32(pb); /* max bit rate */ |
| st->codec->bit_rate = get_be32(pb); /* bit rate */ |
| get_be32(pb); /* max packet size */ |
| get_be32(pb); /* avg packet size */ |
| start_time = get_be32(pb); /* start time */ |
| get_be32(pb); /* preroll */ |
| duration = get_be32(pb); /* duration */ |
| st->start_time = start_time; |
| st->duration = duration; |
| get_str8(pb, buf, sizeof(buf)); /* desc */ |
| get_str8(pb, buf, sizeof(buf)); /* mimetype */ |
| codec_data_size = get_be32(pb); |
| codec_pos = url_ftell(pb); |
| st->codec->codec_type = CODEC_TYPE_DATA; |
| av_set_pts_info(st, 64, 1, 1000); |
| |
| v = get_be32(pb); |
| if (v == MKTAG(0xfd, 'a', 'r', '.')) { |
| /* ra type header */ |
| rm_read_audio_stream_info(s, st, 0); |
| } else { |
| int fps, fps2; |
| if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) { |
| fail1: |
| av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n"); |
| goto skip; |
| } |
| st->codec->codec_tag = get_le32(pb); |
| // av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0')); |
| if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0') |
| && st->codec->codec_tag != MKTAG('R', 'V', '2', '0') |
| && st->codec->codec_tag != MKTAG('R', 'V', '3', '0') |
| && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')) |
| goto fail1; |
| st->codec->width = get_be16(pb); |
| st->codec->height = get_be16(pb); |
| st->codec->time_base.num= 1; |
| fps= get_be16(pb); |
| st->codec->codec_type = CODEC_TYPE_VIDEO; |
| get_be32(pb); |
| fps2= get_be16(pb); |
| get_be16(pb); |
| |
| st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos); |
| st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| get_buffer(pb, st->codec->extradata, st->codec->extradata_size); |
| |
| // av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2); |
| st->codec->time_base.den = fps * st->codec->time_base.num; |
| /* modification of h263 codec version (!) */ |
| #ifdef WORDS_BIGENDIAN |
| h263_hack_version = ((uint32_t*)st->codec->extradata)[1]; |
| #else |
| h263_hack_version = bswap_32(((uint32_t*)st->codec->extradata)[1]); |
| #endif |
| st->codec->sub_id = h263_hack_version; |
| switch((h263_hack_version>>28)){ |
| case 1: st->codec->codec_id = CODEC_ID_RV10; break; |
| case 2: st->codec->codec_id = CODEC_ID_RV20; break; |
| case 3: st->codec->codec_id = CODEC_ID_RV30; break; |
| case 4: st->codec->codec_id = CODEC_ID_RV40; break; |
| default: goto fail1; |
| } |
| } |
| skip: |
| /* skip codec info */ |
| size = url_ftell(pb) - codec_pos; |
| url_fskip(pb, codec_data_size - size); |
| break; |
| case MKTAG('D', 'A', 'T', 'A'): |
| goto header_end; |
| default: |
| /* unknown tag: skip it */ |
| url_fskip(pb, tag_size - 10); |
| break; |
| } |
| } |
| header_end: |
| rm->nb_packets = get_be32(pb); /* number of packets */ |
| if (!rm->nb_packets && (flags & 4)) |
| rm->nb_packets = 3600 * 25; |
| get_be32(pb); /* next data header */ |
| return 0; |
| |
| fail: |
| for(i=0;i<s->nb_streams;i++) { |
| av_free(s->streams[i]); |
| } |
| return AVERROR_IO; |
| } |
| |
| static int get_num(ByteIOContext *pb, int *len) |
| { |
| int n, n1; |
| |
| n = get_be16(pb); |
| (*len)-=2; |
| if (n >= 0x4000) { |
| return n - 0x4000; |
| } else { |
| n1 = get_be16(pb); |
| (*len)-=2; |
| return (n << 16) | n1; |
| } |
| } |
| |
| /* multiple of 20 bytes for ra144 (ugly) */ |
| #define RAW_PACKET_SIZE 1000 |
| |
| static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){ |
| RMContext *rm = s->priv_data; |
| ByteIOContext *pb = &s->pb; |
| int len, num, res, i; |
| AVStream *st; |
| uint32_t state=0xFFFFFFFF; |
| |
| while(!url_feof(pb)){ |
| *pos= url_ftell(pb); |
| if(rm->remaining_len > 0){ |
| num= rm->current_stream; |
| len= rm->remaining_len; |
| *timestamp = AV_NOPTS_VALUE; |
| *flags= 0; |
| }else{ |
| state= (state<<8) + get_byte(pb); |
| |
| if(state == MKBETAG('I', 'N', 'D', 'X')){ |
| len = get_be16(pb) - 6; |
| if(len<0) |
| continue; |
| goto skip; |
| } |
| |
| if(state > (unsigned)0xFFFF || state < 12) |
| continue; |
| len=state; |
| state= 0xFFFFFFFF; |
| |
| num = get_be16(pb); |
| *timestamp = get_be32(pb); |
| res= get_byte(pb); /* reserved */ |
| *flags = get_byte(pb); /* flags */ |
| |
| |
| len -= 12; |
| } |
| for(i=0;i<s->nb_streams;i++) { |
| st = s->streams[i]; |
| if (num == st->id) |
| break; |
| } |
| if (i == s->nb_streams) { |
| skip: |
| /* skip packet if unknown number */ |
| url_fskip(pb, len); |
| rm->remaining_len -= len; |
| continue; |
| } |
| *stream_index= i; |
| |
| return len; |
| } |
| return -1; |
| } |
| |
| static int rm_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| RMContext *rm = s->priv_data; |
| ByteIOContext *pb = &s->pb; |
| AVStream *st; |
| int i, len, tmp, j; |
| int64_t timestamp, pos; |
| uint8_t *ptr; |
| int flags; |
| |
| if (rm->audio_pkt_cnt) { |
| // If there are queued audio packet return them first |
| st = s->streams[rm->audio_stream_num]; |
| av_new_packet(pkt, st->codec->block_align); |
| memcpy(pkt->data, rm->audiobuf + st->codec->block_align * |
| (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt), |
| st->codec->block_align); |
| rm->audio_pkt_cnt--; |
| pkt->flags = 0; |
| pkt->stream_index = rm->audio_stream_num; |
| } else if (rm->old_format) { |
| st = s->streams[0]; |
| if (st->codec->codec_id == CODEC_ID_RA_288) { |
| int x, y; |
| |
| for (y = 0; y < rm->sub_packet_h; y++) |
| for (x = 0; x < rm->sub_packet_h/2; x++) |
| if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0) |
| return AVERROR_IO; |
| rm->audio_stream_num = 0; |
| rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1; |
| // Release first audio packet |
| av_new_packet(pkt, st->codec->block_align); |
| memcpy(pkt->data, rm->audiobuf, st->codec->block_align); |
| pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe |
| pkt->stream_index = 0; |
| } else { |
| /* just read raw bytes */ |
| len = RAW_PACKET_SIZE; |
| len= av_get_packet(pb, pkt, len); |
| pkt->stream_index = 0; |
| if (len <= 0) { |
| return AVERROR_IO; |
| } |
| pkt->size = len; |
| } |
| } else { |
| int seq=1; |
| resync: |
| len=sync(s, ×tamp, &flags, &i, &pos); |
| if(len<0) |
| return AVERROR_IO; |
| st = s->streams[i]; |
| |
| if (st->codec->codec_type == CODEC_TYPE_VIDEO) { |
| int h, pic_num, len2, pos; |
| |
| h= get_byte(pb); len--; |
| if(!(h & 0x40)){ |
| seq = get_byte(pb); len--; |
| } |
| |
| if((h & 0xc0) == 0x40){ |
| len2= pos= 0; |
| }else{ |
| len2 = get_num(pb, &len); |
| pos = get_num(pb, &len); |
| } |
| /* picture number */ |
| pic_num= get_byte(pb); len--; |
| rm->remaining_len= len; |
| rm->current_stream= st->id; |
| |
| // av_log(NULL, AV_LOG_DEBUG, "%X len:%d pos:%d len2:%d pic_num:%d\n",h, len, pos, len2, pic_num); |
| if(len2 && len2<len) |
| len=len2; |
| rm->remaining_len-= len; |
| av_get_packet(pb, pkt, len); |
| } |
| |
| if (st->codec->codec_type == CODEC_TYPE_AUDIO) { |
| if ((st->codec->codec_id == CODEC_ID_RA_288) || |
| (st->codec->codec_id == CODEC_ID_COOK)) { |
| int x; |
| int sps = rm->sub_packet_size; |
| int cfs = rm->coded_framesize; |
| int h = rm->sub_packet_h; |
| int y = rm->sub_packet_cnt; |
| int w = rm->audio_framesize; |
| |
| if (flags & 2) |
| y = rm->sub_packet_cnt = 0; |
| if (!y) |
| rm->audiotimestamp = timestamp; |
| |
| switch(st->codec->codec_id) { |
| case CODEC_ID_RA_288: |
| for (x = 0; x < h/2; x++) |
| get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs); |
| break; |
| case CODEC_ID_COOK: |
| for (x = 0; x < w/sps; x++) |
| get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps); |
| break; |
| } |
| |
| if (++(rm->sub_packet_cnt) < h) |
| goto resync; |
| else { |
| rm->sub_packet_cnt = 0; |
| rm->audio_stream_num = i; |
| rm->audio_pkt_cnt = h * w / st->codec->block_align - 1; |
| // Release first audio packet |
| av_new_packet(pkt, st->codec->block_align); |
| memcpy(pkt->data, rm->audiobuf, st->codec->block_align); |
| timestamp = rm->audiotimestamp; |
| flags = 2; // Mark first packet as keyframe |
| } |
| } else |
| av_get_packet(pb, pkt, len); |
| } |
| |
| if( (st->discard >= AVDISCARD_NONKEY && !(flags&2)) |
| || st->discard >= AVDISCARD_ALL){ |
| av_free_packet(pkt); |
| goto resync; |
| } |
| |
| pkt->stream_index = i; |
| |
| #if 0 |
| if (st->codec->codec_type == CODEC_TYPE_VIDEO) { |
| if(st->codec->codec_id == CODEC_ID_RV20){ |
| int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1); |
| av_log(NULL, AV_LOG_DEBUG, "%d %Ld %d\n", timestamp, timestamp*512LL/25, seq); |
| |
| seq |= (timestamp&~0x3FFF); |
| if(seq - timestamp > 0x2000) seq -= 0x4000; |
| if(seq - timestamp < -0x2000) seq += 0x4000; |
| } |
| } |
| #endif |
| pkt->pts= timestamp; |
| if(flags&2){ |
| pkt->flags |= PKT_FLAG_KEY; |
| if((seq&0x7F) == 1) |
| av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME); |
| } |
| } |
| |
| /* for AC3, needs to swap bytes */ |
| if (st->codec->codec_id == CODEC_ID_AC3) { |
| ptr = pkt->data; |
| for(j=0;j<len;j+=2) { |
| tmp = ptr[0]; |
| ptr[0] = ptr[1]; |
| ptr[1] = tmp; |
| ptr += 2; |
| } |
| } |
| return 0; |
| } |
| |
| static int rm_read_close(AVFormatContext *s) |
| { |
| RMContext *rm = s->priv_data; |
| |
| av_free(rm->audiobuf); |
| return 0; |
| } |
| |
| static int rm_probe(AVProbeData *p) |
| { |
| /* check file header */ |
| if (p->buf_size <= 32) |
| return 0; |
| if ((p->buf[0] == '.' && p->buf[1] == 'R' && |
| p->buf[2] == 'M' && p->buf[3] == 'F' && |
| p->buf[4] == 0 && p->buf[5] == 0) || |
| (p->buf[0] == '.' && p->buf[1] == 'r' && |
| p->buf[2] == 'a' && p->buf[3] == 0xfd)) |
| return AVPROBE_SCORE_MAX; |
| else |
| return 0; |
| } |
| |
| static int64_t rm_read_dts(AVFormatContext *s, int stream_index, |
| int64_t *ppos, int64_t pos_limit) |
| { |
| RMContext *rm = s->priv_data; |
| int64_t pos, dts; |
| int stream_index2, flags, len, h; |
| |
| pos = *ppos; |
| |
| if(rm->old_format) |
| return AV_NOPTS_VALUE; |
| |
| url_fseek(&s->pb, pos, SEEK_SET); |
| rm->remaining_len=0; |
| for(;;){ |
| int seq=1; |
| AVStream *st; |
| |
| len=sync(s, &dts, &flags, &stream_index2, &pos); |
| if(len<0) |
| return AV_NOPTS_VALUE; |
| |
| st = s->streams[stream_index2]; |
| if (st->codec->codec_type == CODEC_TYPE_VIDEO) { |
| h= get_byte(&s->pb); len--; |
| if(!(h & 0x40)){ |
| seq = get_byte(&s->pb); len--; |
| } |
| } |
| |
| if((flags&2) && (seq&0x7F) == 1){ |
| // av_log(s, AV_LOG_DEBUG, "%d %d-%d %Ld %d\n", flags, stream_index2, stream_index, dts, seq); |
| av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME); |
| if(stream_index2 == stream_index) |
| break; |
| } |
| |
| url_fskip(&s->pb, len); |
| } |
| *ppos = pos; |
| return dts; |
| } |
| |
| static AVInputFormat rm_iformat = { |
| "rm", |
| "rm format", |
| sizeof(RMContext), |
| rm_probe, |
| rm_read_header, |
| rm_read_packet, |
| rm_read_close, |
| NULL, |
| rm_read_dts, |
| }; |
| |
| #ifdef CONFIG_MUXERS |
| static AVOutputFormat rm_oformat = { |
| "rm", |
| "rm format", |
| "application/vnd.rn-realmedia", |
| "rm,ra", |
| sizeof(RMContext), |
| CODEC_ID_AC3, |
| CODEC_ID_RV10, |
| rm_write_header, |
| rm_write_packet, |
| rm_write_trailer, |
| }; |
| #endif //CONFIG_MUXERS |
| |
| int rm_init(void) |
| { |
| av_register_input_format(&rm_iformat); |
| #ifdef CONFIG_MUXERS |
| av_register_output_format(&rm_oformat); |
| #endif //CONFIG_MUXERS |
| return 0; |
| } |
