/* * RAW encoder and decoder * Copyright (c) 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "avformat.h" /* simple formats */ int raw_write_header(struct AVFormatContext *s) { return 0; } int raw_write_packet(struct AVFormatContext *s, int stream_index, unsigned char *buf, int size, int force_pts) { put_buffer(&s->pb, buf, size); put_flush_packet(&s->pb); return 0; } int raw_write_trailer(struct AVFormatContext *s) { return 0; } /* raw input */ static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap) { AVStream *st; int id; st = av_new_stream(s, 0); if (!st) return AVERROR_NOMEM; if (ap) { id = s->iformat->value; if (id == CODEC_ID_RAWVIDEO) { st->codec.codec_type = CODEC_TYPE_VIDEO; } else { st->codec.codec_type = CODEC_TYPE_AUDIO; } st->codec.codec_id = id; switch(st->codec.codec_type) { case CODEC_TYPE_AUDIO: st->codec.sample_rate = ap->sample_rate; st->codec.channels = ap->channels; break; case CODEC_TYPE_VIDEO: st->codec.frame_rate = ap->frame_rate; st->codec.width = ap->width; st->codec.height = ap->height; break; default: return -1; } } else { return -1; } return 0; } #define RAW_PACKET_SIZE 1024 int raw_read_packet(AVFormatContext *s, AVPacket *pkt) { int ret, size; AVStream *st = s->streams[0]; if(st->codec.codec_id == CODEC_ID_MPEG4) size= 1024*1024; //cant handle partial frames else size= RAW_PACKET_SIZE; if (av_new_packet(pkt, size) < 0) return -EIO; pkt->stream_index = 0; ret = get_buffer(&s->pb, pkt->data, size); if (ret <= 0) { av_free_packet(pkt); return -EIO; } /* note: we need to modify the packet size here to handle the last packet */ pkt->size = ret; return ret; } int raw_read_close(AVFormatContext *s) { return 0; } /* mp3 read */ static int mp3_read_header(AVFormatContext *s, AVFormatParameters *ap) { AVStream *st; st = av_new_stream(s, 0); if (!st) return AVERROR_NOMEM; st->codec.codec_type = CODEC_TYPE_AUDIO; st->codec.codec_id = CODEC_ID_MP2; /* the parameters will be extracted from the compressed bitstream */ return 0; } /* mpeg1/h263 input */ static int video_read_header(AVFormatContext *s, AVFormatParameters *ap) { AVStream *st; st = av_new_stream(s, 0); if (!st) return AVERROR_NOMEM; st->codec.codec_type = CODEC_TYPE_VIDEO; st->codec.codec_id = s->iformat->value; /* for mjpeg, specify frame rate */ /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/ if (st->codec.codec_id == CODEC_ID_MJPEG || st->codec.codec_id == CODEC_ID_MPEG4) { if (ap) { st->codec.frame_rate = ap->frame_rate; } else { st->codec.frame_rate = 25 * FRAME_RATE_BASE; } } return 0; } #define SEQ_START_CODE 0x000001b3 #define GOP_START_CODE 0x000001b8 #define PICTURE_START_CODE 0x00000100 /* XXX: improve that by looking at several start codes */ static int mpegvideo_probe(AVProbeData *p) { int code, c, i; code = 0xff; /* we search the first start code. If it is a sequence, gop or picture start code then we decide it is an mpeg video stream. We do not send highest value to give a chance to mpegts */ for(i=0;ibuf_size;i++) { c = p->buf[i]; code = (code << 8) | c; if ((code & 0xffffff00) == 0x100) { if (code == SEQ_START_CODE || code == GOP_START_CODE || code == PICTURE_START_CODE) return AVPROBE_SCORE_MAX - 1; else return 0; } } return 0; } AVInputFormat mp3_iformat = { "mp3", "MPEG audio", 0, NULL, mp3_read_header, raw_read_packet, raw_read_close, .extensions = "mp2,mp3", /* XXX: use probe */ }; AVOutputFormat mp2_oformat = { "mp2", "MPEG audio layer 2", "audio/x-mpeg", "mp2,mp3", 0, CODEC_ID_MP2, 0, raw_write_header, raw_write_packet, raw_write_trailer, }; AVInputFormat ac3_iformat = { "ac3", "raw ac3", 0, NULL, raw_read_header, raw_read_packet, raw_read_close, .extensions = "ac3", .value = CODEC_ID_AC3, }; AVOutputFormat ac3_oformat = { "ac3", "raw ac3", "audio/x-ac3", "ac3", 0, CODEC_ID_AC3, 0, raw_write_header, raw_write_packet, raw_write_trailer, }; AVOutputFormat h263_oformat = { "h263", "raw h263", "video/x-h263", "h263", 0, 0, CODEC_ID_H263, raw_write_header, raw_write_packet, raw_write_trailer, }; AVInputFormat m4v_iformat = { "m4v", "raw MPEG4 video format", 0, NULL /*mpegvideo_probe*/, video_read_header, raw_read_packet, raw_read_close, .extensions = "m4v", //FIXME remove after writing mpeg4_probe .value = CODEC_ID_MPEG4, }; AVOutputFormat m4v_oformat = { "m4v", "raw MPEG4 video format", NULL, "m4v", 0, CODEC_ID_NONE, CODEC_ID_MPEG4, raw_write_header, raw_write_packet, raw_write_trailer, }; AVInputFormat mpegvideo_iformat = { "mpegvideo", "MPEG video", 0, mpegvideo_probe, video_read_header, raw_read_packet, raw_read_close, .value = CODEC_ID_MPEG1VIDEO, }; AVOutputFormat mpeg1video_oformat = { "mpeg1video", "MPEG video", "video/x-mpeg", "mpg,mpeg", 0, 0, CODEC_ID_MPEG1VIDEO, raw_write_header, raw_write_packet, raw_write_trailer, }; AVInputFormat mjpeg_iformat = { "mjpeg", "MJPEG video", 0, NULL, video_read_header, raw_read_packet, raw_read_close, .extensions = "mjpg,mjpeg", .value = CODEC_ID_MJPEG, }; AVOutputFormat mjpeg_oformat = { "mjpeg", "MJPEG video", "video/x-mjpeg", "mjpg,mjpeg", 0, 0, CODEC_ID_MJPEG, raw_write_header, raw_write_packet, raw_write_trailer, }; /* pcm formats */ #define PCMDEF(name, long_name, ext, codec) \ AVInputFormat pcm_ ## name ## _iformat = {\ #name,\ long_name,\ 0,\ NULL,\ raw_read_header,\ raw_read_packet,\ raw_read_close,\ .extensions = ext,\ .value = codec,\ };\ \ AVOutputFormat pcm_ ## name ## _oformat = {\ #name,\ long_name,\ NULL,\ ext,\ 0,\ codec,\ 0,\ raw_write_header,\ raw_write_packet,\ raw_write_trailer,\ }; #ifdef WORDS_BIGENDIAN #define BE_DEF(s) s #define LE_DEF(s) NULL #else #define BE_DEF(s) NULL #define LE_DEF(s) s #endif PCMDEF(s16le, "pcm signed 16 bit little endian format", LE_DEF("sw"), CODEC_ID_PCM_S16LE) PCMDEF(s16be, "pcm signed 16 bit big endian format", BE_DEF("sw"), CODEC_ID_PCM_S16BE) PCMDEF(u16le, "pcm unsigned 16 bit little endian format", LE_DEF("uw"), CODEC_ID_PCM_U16LE) PCMDEF(u16be, "pcm unsigned 16 bit big endian format", BE_DEF("uw"), CODEC_ID_PCM_U16BE) PCMDEF(s8, "pcm signed 8 bit format", "sb", CODEC_ID_PCM_S8) PCMDEF(u8, "pcm unsigned 8 bit format", "ub", CODEC_ID_PCM_U8) PCMDEF(mulaw, "pcm mu law format", "ul", CODEC_ID_PCM_MULAW) PCMDEF(alaw, "pcm A law format", "al", CODEC_ID_PCM_ALAW) int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt) { int packet_size, ret, width, height; AVStream *st = s->streams[0]; width = st->codec.width; height = st->codec.height; switch(st->codec.pix_fmt) { case PIX_FMT_YUV420P: packet_size = (width * height * 3) / 2; break; case PIX_FMT_YUV422: packet_size = (width * height * 2); break; case PIX_FMT_BGR24: case PIX_FMT_RGB24: packet_size = (width * height * 3); break; default: av_abort(); break; } if (av_new_packet(pkt, packet_size) < 0) return -EIO; pkt->stream_index = 0; #if 0 /* bypass buffered I/O */ ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size); #else ret = get_buffer(&s->pb, pkt->data, pkt->size); #endif if (ret != pkt->size) { av_free_packet(pkt); return -EIO; } else { return 0; } } AVInputFormat rawvideo_iformat = { "rawvideo", "raw video format", 0, NULL, raw_read_header, rawvideo_read_packet, raw_read_close, .extensions = "yuv", .value = CODEC_ID_RAWVIDEO, }; AVOutputFormat rawvideo_oformat = { "rawvideo", "raw video format", NULL, "yuv", 0, CODEC_ID_NONE, CODEC_ID_RAWVIDEO, raw_write_header, raw_write_packet, raw_write_trailer, }; static int null_write_packet(struct AVFormatContext *s, int stream_index, unsigned char *buf, int size, int force_pts) { return 0; } AVOutputFormat null_oformat = { "null", "null video format", NULL, NULL, 0, #ifdef WORDS_BIGENDIAN CODEC_ID_PCM_S16BE, #else CODEC_ID_PCM_S16LE, #endif CODEC_ID_RAWVIDEO, raw_write_header, null_write_packet, raw_write_trailer, flags: AVFMT_NOFILE | AVFMT_RAWPICTURE, }; int raw_init(void) { av_register_input_format(&mp3_iformat); av_register_output_format(&mp2_oformat); av_register_input_format(&ac3_iformat); av_register_output_format(&ac3_oformat); av_register_output_format(&h263_oformat); av_register_input_format(&m4v_iformat); av_register_output_format(&m4v_oformat); av_register_input_format(&mpegvideo_iformat); av_register_output_format(&mpeg1video_oformat); av_register_input_format(&mjpeg_iformat); av_register_output_format(&mjpeg_oformat); av_register_input_format(&pcm_s16le_iformat); av_register_output_format(&pcm_s16le_oformat); av_register_input_format(&pcm_s16be_iformat); av_register_output_format(&pcm_s16be_oformat); av_register_input_format(&pcm_u16le_iformat); av_register_output_format(&pcm_u16le_oformat); av_register_input_format(&pcm_u16be_iformat); av_register_output_format(&pcm_u16be_oformat); av_register_input_format(&pcm_s8_iformat); av_register_output_format(&pcm_s8_oformat); av_register_input_format(&pcm_u8_iformat); av_register_output_format(&pcm_u8_oformat); av_register_input_format(&pcm_mulaw_iformat); av_register_output_format(&pcm_mulaw_oformat); av_register_input_format(&pcm_alaw_iformat); av_register_output_format(&pcm_alaw_oformat); av_register_input_format(&rawvideo_iformat); av_register_output_format(&rawvideo_oformat); av_register_output_format(&null_oformat); return 0; }