/* * RAW encoder and decoder * Copyright (c) 2001 Gerard Lantau. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, 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) { 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; st = malloc(sizeof(AVStream)); if (!st) return -1; s->nb_streams = 1; s->streams[0] = st; st->id = 0; if (ap) { if (s->format->audio_codec != CODEC_ID_NONE) { st->codec.codec_type = CODEC_TYPE_AUDIO; st->codec.codec_id = s->format->audio_codec; } else if (s->format->video_codec != CODEC_ID_NONE) { st->codec.codec_type = CODEC_TYPE_VIDEO; st->codec.codec_id = s->format->video_codec; } else { free(st); return -1; } 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; } /* raw input */ static int pcm_read_header(AVFormatContext *s, AVFormatParameters *ap) { AVStream *st; st = malloc(sizeof(AVStream)); if (!st) return -1; s->nb_streams = 1; s->streams[0] = st; st->id = 0; st->codec.codec_type = CODEC_TYPE_AUDIO; st->codec.codec_id = s->format->audio_codec; return 0; } #define RAW_PACKET_SIZE 1024 int raw_read_packet(AVFormatContext *s, AVPacket *pkt) { int ret; if (av_new_packet(pkt, RAW_PACKET_SIZE) < 0) return -EIO; pkt->stream_index = 0; ret = get_buffer(&s->pb, pkt->data, RAW_PACKET_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 = malloc(sizeof(AVStream)); if (!st) return -1; s->nb_streams = 1; s->streams[0] = st; st->id = 0; 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_mallocz(sizeof(AVStream)); if (!st) return -1; s->nb_streams = 1; s->streams[0] = st; st->codec.codec_type = CODEC_TYPE_VIDEO; st->codec.codec_id = s->format->video_codec; /* for mjpeg, specify frame rate */ if (st->codec.codec_id == CODEC_ID_MJPEG) { if (ap) { st->codec.frame_rate = ap->frame_rate; } else { st->codec.frame_rate = 25 * FRAME_RATE_BASE; } } return 0; } AVFormat mp2_format = { "mp2", "MPEG audio", "audio/x-mpeg", "mp2,mp3", CODEC_ID_MP2, 0, raw_write_header, raw_write_packet, raw_write_trailer, mp3_read_header, raw_read_packet, raw_read_close, }; AVFormat ac3_format = { "ac3", "raw ac3", "audio/x-ac3", "ac3", CODEC_ID_AC3, 0, raw_write_header, raw_write_packet, raw_write_trailer, }; AVFormat h263_format = { "h263", "raw h263", "video/x-h263", "h263", 0, CODEC_ID_H263, raw_write_header, raw_write_packet, raw_write_trailer, video_read_header, raw_read_packet, raw_read_close, }; AVFormat mpeg1video_format = { "mpegvideo", "MPEG video", "video/x-mpeg", "mpg,mpeg", 0, CODEC_ID_MPEG1VIDEO, raw_write_header, raw_write_packet, raw_write_trailer, video_read_header, raw_read_packet, raw_read_close, }; AVFormat mjpeg_format = { "mjpeg", "MJPEG video", "video/x-mjpeg", "mjpg,mjpeg", 0, CODEC_ID_MJPEG, raw_write_header, raw_write_packet, raw_write_trailer, video_read_header, raw_read_packet, raw_read_close, }; /* pcm formats */ AVFormat pcm_s16le_format = { "s16le", "pcm signed 16 bit little endian format", NULL, #ifdef WORDS_BIGENDIAN "", #else "sw", #endif CODEC_ID_PCM_S16LE, 0, raw_write_header, raw_write_packet, raw_write_trailer, pcm_read_header, raw_read_packet, raw_read_close, }; AVFormat pcm_s16be_format = { "s16be", "pcm signed 16 bit big endian format", NULL, #ifdef WORDS_BIGENDIAN "sw", #else "", #endif CODEC_ID_PCM_S16BE, 0, raw_write_header, raw_write_packet, raw_write_trailer, pcm_read_header, raw_read_packet, raw_read_close, }; AVFormat pcm_u16le_format = { "u16le", "pcm unsigned 16 bit little endian format", NULL, #ifdef WORDS_BIGENDIAN "", #else "uw", #endif CODEC_ID_PCM_U16LE, 0, raw_write_header, raw_write_packet, raw_write_trailer, pcm_read_header, raw_read_packet, raw_read_close, }; AVFormat pcm_u16be_format = { "u16be", "pcm unsigned 16 bit big endian format", NULL, #ifdef WORDS_BIGENDIAN "uw", #else "", #endif CODEC_ID_PCM_U16BE, 0, raw_write_header, raw_write_packet, raw_write_trailer, pcm_read_header, raw_read_packet, raw_read_close, }; AVFormat pcm_s8_format = { "s8", "pcm signed 8 bit format", NULL, "sb", CODEC_ID_PCM_S8, 0, raw_write_header, raw_write_packet, raw_write_trailer, pcm_read_header, raw_read_packet, raw_read_close, }; AVFormat pcm_u8_format = { "u8", "pcm unsigned 8 bit format", NULL, "ub", CODEC_ID_PCM_U8, 0, raw_write_header, raw_write_packet, raw_write_trailer, pcm_read_header, raw_read_packet, raw_read_close, }; AVFormat pcm_mulaw_format = { "mulaw", "pcm mu law format", NULL, "ul", CODEC_ID_PCM_MULAW, 0, raw_write_header, raw_write_packet, raw_write_trailer, pcm_read_header, raw_read_packet, raw_read_close, }; AVFormat pcm_alaw_format = { "alaw", "pcm A law format", NULL, "al", CODEC_ID_PCM_ALAW, 0, raw_write_header, raw_write_packet, raw_write_trailer, pcm_read_header, raw_read_packet, raw_read_close, }; 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: abort(); break; } if (av_new_packet(pkt, packet_size) < 0) return -EIO; pkt->stream_index = 0; /* bypass buffered I/O */ ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size); if (ret != pkt->size) { av_free_packet(pkt); return -EIO; } else { return 0; } } AVFormat rawvideo_format = { "rawvideo", "raw video format", NULL, "yuv", CODEC_ID_NONE, CODEC_ID_RAWVIDEO, raw_write_header, raw_write_packet, raw_write_trailer, raw_read_header, rawvideo_read_packet, raw_read_close, };