mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 9156 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Aurelien Jacobs
18 years ago
parent
2db27aadcb
commit
7b2a2ce556
4 changed files with 503 additions and 456 deletions
@ -0,0 +1,60 @@ |
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/*
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* "Real" compatible muxer and demuxer. |
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* Copyright (c) 2000, 2001 Fabrice Bellard. |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef RM_H |
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#define RM_H |
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#include "avformat.h" |
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typedef struct { |
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int nb_packets; |
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int packet_total_size; |
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int packet_max_size; |
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/* codec related output */ |
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int bit_rate; |
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float frame_rate; |
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int nb_frames; /* current frame number */ |
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int total_frames; /* total number of frames */ |
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int num; |
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AVCodecContext *enc; |
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} StreamInfo; |
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typedef struct { |
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StreamInfo streams[2]; |
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StreamInfo *audio_stream, *video_stream; |
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int data_pos; /* position of the data after the header */ |
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int nb_packets; |
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int old_format; |
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int current_stream; |
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int remaining_len; |
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/// Audio descrambling matrix parameters
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uint8_t *audiobuf; ///< place to store reordered audio data
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int64_t audiotimestamp; ///< Audio packet timestamp
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int sub_packet_cnt; // Subpacket counter, used while reading
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int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
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int audio_stream_num; ///< Stream number for audio packets
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int audio_pkt_cnt; ///< Output packet counter
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int audio_framesize; /// Audio frame size from container
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int sub_packet_lengths[16]; /// Length of each aac subpacket
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} RMContext; |
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#endif /* RM_H */ |
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@ -0,0 +1,439 @@ |
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/*
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* "Real" compatible muxer. |
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* Copyright (c) 2000, 2001 Fabrice Bellard. |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "avformat.h" |
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#include "rm.h" |
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/* in ms */ |
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#define BUFFER_DURATION 0 |
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static void put_str(ByteIOContext *s, const char *tag) |
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{ |
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put_be16(s,strlen(tag)); |
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while (*tag) { |
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put_byte(s, *tag++); |
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} |
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} |
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static void put_str8(ByteIOContext *s, const char *tag) |
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{ |
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put_byte(s, strlen(tag)); |
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while (*tag) { |
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put_byte(s, *tag++); |
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} |
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} |
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static void rv10_write_header(AVFormatContext *ctx, |
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int data_size, int index_pos) |
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{ |
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RMContext *rm = ctx->priv_data; |
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ByteIOContext *s = &ctx->pb; |
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StreamInfo *stream; |
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unsigned char *data_offset_ptr, *start_ptr; |
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const char *desc, *mimetype; |
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int nb_packets, packet_total_size, packet_max_size, size, packet_avg_size, i; |
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int bit_rate, v, duration, flags, data_pos; |
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start_ptr = s->buf_ptr; |
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put_tag(s, ".RMF"); |
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put_be32(s,18); /* header size */ |
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put_be16(s,0); |
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put_be32(s,0); |
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put_be32(s,4 + ctx->nb_streams); /* num headers */ |
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put_tag(s,"PROP"); |
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put_be32(s, 50); |
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put_be16(s, 0); |
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packet_max_size = 0; |
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packet_total_size = 0; |
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nb_packets = 0; |
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bit_rate = 0; |
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duration = 0; |
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for(i=0;i<ctx->nb_streams;i++) { |
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StreamInfo *stream = &rm->streams[i]; |
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bit_rate += stream->bit_rate; |
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if (stream->packet_max_size > packet_max_size) |
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packet_max_size = stream->packet_max_size; |
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nb_packets += stream->nb_packets; |
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packet_total_size += stream->packet_total_size; |
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/* select maximum duration */ |
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v = (int) (1000.0 * (float)stream->total_frames / stream->frame_rate); |
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if (v > duration) |
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duration = v; |
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} |
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put_be32(s, bit_rate); /* max bit rate */ |
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put_be32(s, bit_rate); /* avg bit rate */ |
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put_be32(s, packet_max_size); /* max packet size */ |
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if (nb_packets > 0) |
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packet_avg_size = packet_total_size / nb_packets; |
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else |
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packet_avg_size = 0; |
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put_be32(s, packet_avg_size); /* avg packet size */ |
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put_be32(s, nb_packets); /* num packets */ |
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put_be32(s, duration); /* duration */ |
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put_be32(s, BUFFER_DURATION); /* preroll */ |
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put_be32(s, index_pos); /* index offset */ |
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/* computation of data the data offset */ |
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data_offset_ptr = s->buf_ptr; |
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put_be32(s, 0); /* data offset : will be patched after */ |
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put_be16(s, ctx->nb_streams); /* num streams */ |
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flags = 1 | 2; /* save allowed & perfect play */ |
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if (url_is_streamed(s)) |
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flags |= 4; /* live broadcast */ |
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put_be16(s, flags); |
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/* comments */ |
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put_tag(s,"CONT"); |
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size = strlen(ctx->title) + strlen(ctx->author) + strlen(ctx->copyright) + |
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strlen(ctx->comment) + 4 * 2 + 10; |
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put_be32(s,size); |
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put_be16(s,0); |
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put_str(s, ctx->title); |
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put_str(s, ctx->author); |
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put_str(s, ctx->copyright); |
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put_str(s, ctx->comment); |
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for(i=0;i<ctx->nb_streams;i++) { |
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int codec_data_size; |
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stream = &rm->streams[i]; |
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if (stream->enc->codec_type == CODEC_TYPE_AUDIO) { |
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desc = "The Audio Stream"; |
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mimetype = "audio/x-pn-realaudio"; |
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codec_data_size = 73; |
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} else { |
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desc = "The Video Stream"; |
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mimetype = "video/x-pn-realvideo"; |
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codec_data_size = 34; |
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} |
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put_tag(s,"MDPR"); |
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size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size; |
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put_be32(s, size); |
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put_be16(s, 0); |
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put_be16(s, i); /* stream number */ |
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put_be32(s, stream->bit_rate); /* max bit rate */ |
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put_be32(s, stream->bit_rate); /* avg bit rate */ |
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put_be32(s, stream->packet_max_size); /* max packet size */ |
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if (stream->nb_packets > 0) |
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packet_avg_size = stream->packet_total_size / |
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stream->nb_packets; |
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else |
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packet_avg_size = 0; |
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put_be32(s, packet_avg_size); /* avg packet size */ |
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put_be32(s, 0); /* start time */ |
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put_be32(s, BUFFER_DURATION); /* preroll */ |
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/* duration */ |
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if (url_is_streamed(s) || !stream->total_frames) |
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put_be32(s, (int)(3600 * 1000)); |
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else |
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put_be32(s, (int)(stream->total_frames * 1000 / stream->frame_rate)); |
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put_str8(s, desc); |
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put_str8(s, mimetype); |
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put_be32(s, codec_data_size); |
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if (stream->enc->codec_type == CODEC_TYPE_AUDIO) { |
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int coded_frame_size, fscode, sample_rate; |
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sample_rate = stream->enc->sample_rate; |
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coded_frame_size = (stream->enc->bit_rate * |
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stream->enc->frame_size) / (8 * sample_rate); |
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/* audio codec info */ |
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put_tag(s, ".ra"); |
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put_byte(s, 0xfd); |
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put_be32(s, 0x00040000); /* version */ |
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put_tag(s, ".ra4"); |
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put_be32(s, 0x01b53530); /* stream length */ |
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put_be16(s, 4); /* unknown */ |
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put_be32(s, 0x39); /* header size */ |
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switch(sample_rate) { |
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case 48000: |
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case 24000: |
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case 12000: |
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fscode = 1; |
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break; |
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default: |
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case 44100: |
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case 22050: |
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case 11025: |
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fscode = 2; |
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break; |
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case 32000: |
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case 16000: |
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case 8000: |
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fscode = 3; |
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} |
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put_be16(s, fscode); /* codec additional info, for AC3, seems
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to be a frequency code */ |
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/* special hack to compensate rounding errors... */ |
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if (coded_frame_size == 557) |
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coded_frame_size--; |
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put_be32(s, coded_frame_size); /* frame length */ |
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put_be32(s, 0x51540); /* unknown */ |
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put_be32(s, 0x249f0); /* unknown */ |
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put_be32(s, 0x249f0); /* unknown */ |
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put_be16(s, 0x01); |
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/* frame length : seems to be very important */ |
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put_be16(s, coded_frame_size); |
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put_be32(s, 0); /* unknown */ |
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put_be16(s, stream->enc->sample_rate); /* sample rate */ |
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put_be32(s, 0x10); /* unknown */ |
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put_be16(s, stream->enc->channels); |
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put_str8(s, "Int0"); /* codec name */ |
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put_str8(s, "dnet"); /* codec name */ |
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put_be16(s, 0); /* title length */ |
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put_be16(s, 0); /* author length */ |
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put_be16(s, 0); /* copyright length */ |
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put_byte(s, 0); /* end of header */ |
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} else { |
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/* video codec info */ |
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put_be32(s,34); /* size */ |
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if(stream->enc->codec_id == CODEC_ID_RV10) |
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put_tag(s,"VIDORV10"); |
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else |
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put_tag(s,"VIDORV20"); |
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put_be16(s, stream->enc->width); |
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put_be16(s, stream->enc->height); |
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put_be16(s, (int) stream->frame_rate); /* frames per seconds ? */ |
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put_be32(s,0); /* unknown meaning */ |
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put_be16(s, (int) stream->frame_rate); /* unknown meaning */ |
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put_be32(s,0); /* unknown meaning */ |
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put_be16(s, 8); /* unknown meaning */ |
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/* Seems to be the codec version: only use basic H263. The next
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versions seems to add a diffential DC coding as in |
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MPEG... nothing new under the sun */ |
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if(stream->enc->codec_id == CODEC_ID_RV10) |
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put_be32(s,0x10000000); |
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else |
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put_be32(s,0x20103001); |
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//put_be32(s,0x10003000);
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} |
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} |
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/* patch data offset field */ |
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data_pos = s->buf_ptr - start_ptr; |
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rm->data_pos = data_pos; |
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data_offset_ptr[0] = data_pos >> 24; |
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data_offset_ptr[1] = data_pos >> 16; |
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data_offset_ptr[2] = data_pos >> 8; |
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data_offset_ptr[3] = data_pos; |
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/* data stream */ |
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put_tag(s,"DATA"); |
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put_be32(s,data_size + 10 + 8); |
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put_be16(s,0); |
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put_be32(s, nb_packets); /* number of packets */ |
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put_be32(s,0); /* next data header */ |
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} |
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static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream, |
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int length, int key_frame) |
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{ |
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int timestamp; |
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ByteIOContext *s = &ctx->pb; |
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stream->nb_packets++; |
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stream->packet_total_size += length; |
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if (length > stream->packet_max_size) |
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stream->packet_max_size = length; |
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put_be16(s,0); /* version */ |
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put_be16(s,length + 12); |
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put_be16(s, stream->num); /* stream number */ |
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timestamp = (1000 * (float)stream->nb_frames) / stream->frame_rate; |
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put_be32(s, timestamp); /* timestamp */ |
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put_byte(s, 0); /* reserved */ |
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put_byte(s, key_frame ? 2 : 0); /* flags */ |
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} |
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static int rm_write_header(AVFormatContext *s) |
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{ |
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RMContext *rm = s->priv_data; |
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StreamInfo *stream; |
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int n; |
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AVCodecContext *codec; |
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for(n=0;n<s->nb_streams;n++) { |
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s->streams[n]->id = n; |
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codec = s->streams[n]->codec; |
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stream = &rm->streams[n]; |
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memset(stream, 0, sizeof(StreamInfo)); |
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stream->num = n; |
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stream->bit_rate = codec->bit_rate; |
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stream->enc = codec; |
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switch(codec->codec_type) { |
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case CODEC_TYPE_AUDIO: |
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rm->audio_stream = stream; |
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stream->frame_rate = (float)codec->sample_rate / (float)codec->frame_size; |
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/* XXX: dummy values */ |
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stream->packet_max_size = 1024; |
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stream->nb_packets = 0; |
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stream->total_frames = stream->nb_packets; |
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break; |
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case CODEC_TYPE_VIDEO: |
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rm->video_stream = stream; |
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stream->frame_rate = (float)codec->time_base.den / (float)codec->time_base.num; |
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/* XXX: dummy values */ |
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stream->packet_max_size = 4096; |
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stream->nb_packets = 0; |
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stream->total_frames = stream->nb_packets; |
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break; |
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default: |
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return -1; |
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} |
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} |
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rv10_write_header(s, 0, 0); |
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put_flush_packet(&s->pb); |
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return 0; |
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} |
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static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size, int flags) |
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{ |
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uint8_t *buf1; |
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RMContext *rm = s->priv_data; |
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ByteIOContext *pb = &s->pb; |
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StreamInfo *stream = rm->audio_stream; |
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int i; |
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/* XXX: suppress this malloc */ |
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buf1= (uint8_t*) av_malloc( size * sizeof(uint8_t) ); |
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write_packet_header(s, stream, size, !!(flags & PKT_FLAG_KEY)); |
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/* for AC3, the words seems to be reversed */ |
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for(i=0;i<size;i+=2) { |
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buf1[i] = buf[i+1]; |
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buf1[i+1] = buf[i]; |
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} |
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put_buffer(pb, buf1, size); |
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put_flush_packet(pb); |
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stream->nb_frames++; |
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av_free(buf1); |
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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; |
||||||
|
} |
||||||
|
|
||||||
|
|
||||||
|
AVOutputFormat rm_muxer = { |
||||||
|
"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, |
||||||
|
}; |
||||||
Loading…
Reference in new issue