| /* |
| * NUT (de)muxing via libnut |
| * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * NUT demuxing and muxing via libnut. |
| * @author Oded Shimon <ods15@ods15.dyndns.org> |
| */ |
| |
| #include "avformat.h" |
| #include "internal.h" |
| #include "riff.h" |
| #include <libnut.h> |
| |
| #define ID_STRING "nut/multimedia container" |
| #define ID_LENGTH (strlen(ID_STRING) + 1) |
| |
| typedef struct { |
| nut_context_tt * nut; |
| nut_stream_header_tt * s; |
| } NUTContext; |
| |
| static const AVCodecTag nut_tags[] = { |
| { AV_CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') }, |
| { AV_CODEC_ID_MP3, MKTAG('m', 'p', '3', ' ') }, |
| { AV_CODEC_ID_VORBIS, MKTAG('v', 'r', 'b', 's') }, |
| { 0, 0 }, |
| }; |
| |
| #if CONFIG_LIBNUT_MUXER |
| static int av_write(void * h, size_t len, const uint8_t * buf) { |
| AVIOContext * bc = h; |
| avio_write(bc, buf, len); |
| //avio_flush(bc); |
| return len; |
| } |
| |
| static int nut_write_header(AVFormatContext * avf) { |
| NUTContext * priv = avf->priv_data; |
| AVIOContext * bc = avf->pb; |
| nut_muxer_opts_tt mopts = { |
| .output = { |
| .priv = bc, |
| .write = av_write, |
| }, |
| .alloc = { av_malloc, av_realloc, av_free }, |
| .write_index = 1, |
| .realtime_stream = 0, |
| .max_distance = 32768, |
| .fti = NULL, |
| }; |
| nut_stream_header_tt * s; |
| int i; |
| |
| priv->s = s = av_mallocz((avf->nb_streams + 1) * sizeof*s); |
| if(!s) |
| return AVERROR(ENOMEM); |
| |
| for (i = 0; i < avf->nb_streams; i++) { |
| AVCodecContext * codec = avf->streams[i]->codec; |
| int j; |
| int fourcc = 0; |
| int num, denom, ssize; |
| |
| s[i].type = codec->codec_type == AVMEDIA_TYPE_VIDEO ? NUT_VIDEO_CLASS : NUT_AUDIO_CLASS; |
| |
| if (codec->codec_tag) fourcc = codec->codec_tag; |
| else fourcc = ff_codec_get_tag(nut_tags, codec->codec_id); |
| |
| if (!fourcc) { |
| if (codec->codec_type == AVMEDIA_TYPE_VIDEO) fourcc = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id); |
| if (codec->codec_type == AVMEDIA_TYPE_AUDIO) fourcc = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id); |
| } |
| |
| s[i].fourcc_len = 4; |
| s[i].fourcc = av_malloc(s[i].fourcc_len); |
| for (j = 0; j < s[i].fourcc_len; j++) s[i].fourcc[j] = (fourcc >> (j*8)) & 0xFF; |
| |
| ff_parse_specific_params(codec, &num, &ssize, &denom); |
| avpriv_set_pts_info(avf->streams[i], 60, denom, num); |
| |
| s[i].time_base.num = denom; |
| s[i].time_base.den = num; |
| |
| s[i].fixed_fps = 0; |
| s[i].decode_delay = codec->has_b_frames; |
| s[i].codec_specific_len = codec->extradata_size; |
| s[i].codec_specific = codec->extradata; |
| |
| if (codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| s[i].width = codec->width; |
| s[i].height = codec->height; |
| s[i].sample_width = 0; |
| s[i].sample_height = 0; |
| s[i].colorspace_type = 0; |
| } else { |
| s[i].samplerate_num = codec->sample_rate; |
| s[i].samplerate_denom = 1; |
| s[i].channel_count = codec->channels; |
| } |
| } |
| |
| s[avf->nb_streams].type = -1; |
| priv->nut = nut_muxer_init(&mopts, s, NULL); |
| |
| return 0; |
| } |
| |
| static int nut_write_packet(AVFormatContext * avf, AVPacket * pkt) { |
| NUTContext * priv = avf->priv_data; |
| nut_packet_tt p; |
| |
| p.len = pkt->size; |
| p.stream = pkt->stream_index; |
| p.pts = pkt->pts; |
| p.flags = pkt->flags & AV_PKT_FLAG_KEY ? NUT_FLAG_KEY : 0; |
| p.next_pts = 0; |
| |
| nut_write_frame_reorder(priv->nut, &p, pkt->data); |
| |
| return 0; |
| } |
| |
| static int nut_write_trailer(AVFormatContext * avf) { |
| AVIOContext * bc = avf->pb; |
| NUTContext * priv = avf->priv_data; |
| int i; |
| |
| nut_muxer_uninit_reorder(priv->nut); |
| avio_flush(bc); |
| |
| for(i = 0; priv->s[i].type != -1; i++ ) av_freep(&priv->s[i].fourcc); |
| av_freep(&priv->s); |
| |
| return 0; |
| } |
| |
| AVOutputFormat ff_libnut_muxer = { |
| .name = "libnut", |
| .long_name = "nut format", |
| .mime_type = "video/x-nut", |
| .extensions = "nut", |
| .priv_data_size = sizeof(NUTContext), |
| .audio_codec = AV_CODEC_ID_VORBIS, |
| .video_codec = AV_CODEC_ID_MPEG4, |
| .write_header = nut_write_header, |
| .write_packet = nut_write_packet, |
| .write_trailer = nut_write_trailer, |
| .flags = AVFMT_GLOBALHEADER, |
| }; |
| #endif /* CONFIG_LIBNUT_MUXER */ |
| |
| static int nut_probe(AVProbeData *p) { |
| if (!memcmp(p->buf, ID_STRING, ID_LENGTH)) return AVPROBE_SCORE_MAX; |
| |
| return 0; |
| } |
| |
| static size_t av_read(void * h, size_t len, uint8_t * buf) { |
| AVIOContext * bc = h; |
| return avio_read(bc, buf, len); |
| } |
| |
| static off_t av_seek(void * h, long long pos, int whence) { |
| AVIOContext * bc = h; |
| if (whence == SEEK_END) { |
| pos = avio_size(bc) + pos; |
| whence = SEEK_SET; |
| } |
| return avio_seek(bc, pos, whence); |
| } |
| |
| static int nut_read_header(AVFormatContext * avf) { |
| NUTContext * priv = avf->priv_data; |
| AVIOContext * bc = avf->pb; |
| nut_demuxer_opts_tt dopts = { |
| .input = { |
| .priv = bc, |
| .seek = av_seek, |
| .read = av_read, |
| .eof = NULL, |
| .file_pos = 0, |
| }, |
| .alloc = { av_malloc, av_realloc, av_free }, |
| .read_index = 1, |
| .cache_syncpoints = 1, |
| }; |
| nut_context_tt * nut = priv->nut = nut_demuxer_init(&dopts); |
| nut_stream_header_tt * s; |
| int ret, i; |
| |
| if(!nut) |
| return -1; |
| |
| if ((ret = nut_read_headers(nut, &s, NULL))) { |
| av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(ret)); |
| nut_demuxer_uninit(nut); |
| priv->nut = NULL; |
| return -1; |
| } |
| |
| priv->s = s; |
| |
| for (i = 0; s[i].type != -1 && i < 2; i++) { |
| AVStream * st = avformat_new_stream(avf, NULL); |
| int j; |
| |
| for (j = 0; j < s[i].fourcc_len && j < 8; j++) st->codec->codec_tag |= s[i].fourcc[j]<<(j*8); |
| |
| st->codec->has_b_frames = s[i].decode_delay; |
| |
| st->codec->extradata_size = s[i].codec_specific_len; |
| if (st->codec->extradata_size) { |
| st->codec->extradata = av_mallocz(st->codec->extradata_size); |
| if(!st->codec->extradata){ |
| nut_demuxer_uninit(nut); |
| priv->nut = NULL; |
| return AVERROR(ENOMEM); |
| } |
| memcpy(st->codec->extradata, s[i].codec_specific, st->codec->extradata_size); |
| } |
| |
| avpriv_set_pts_info(avf->streams[i], 60, s[i].time_base.num, s[i].time_base.den); |
| st->start_time = 0; |
| st->duration = s[i].max_pts; |
| |
| st->codec->codec_id = ff_codec_get_id(nut_tags, st->codec->codec_tag); |
| |
| switch(s[i].type) { |
| case NUT_AUDIO_CLASS: |
| st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| if (st->codec->codec_id == AV_CODEC_ID_NONE) st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, st->codec->codec_tag); |
| |
| st->codec->channels = s[i].channel_count; |
| st->codec->sample_rate = s[i].samplerate_num / s[i].samplerate_denom; |
| break; |
| case NUT_VIDEO_CLASS: |
| st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| if (st->codec->codec_id == AV_CODEC_ID_NONE) st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag); |
| |
| st->codec->width = s[i].width; |
| st->codec->height = s[i].height; |
| st->sample_aspect_ratio.num = s[i].sample_width; |
| st->sample_aspect_ratio.den = s[i].sample_height; |
| break; |
| } |
| if (st->codec->codec_id == AV_CODEC_ID_NONE) av_log(avf, AV_LOG_ERROR, "Unknown codec?!\n"); |
| } |
| |
| return 0; |
| } |
| |
| static int nut_read_packet(AVFormatContext * avf, AVPacket * pkt) { |
| NUTContext * priv = avf->priv_data; |
| nut_packet_tt pd; |
| int ret; |
| |
| ret = nut_read_next_packet(priv->nut, &pd); |
| |
| if (ret || av_new_packet(pkt, pd.len) < 0) { |
| if (ret != NUT_ERR_EOF) |
| av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(ret)); |
| return -1; |
| } |
| |
| if (pd.flags & NUT_FLAG_KEY) pkt->flags |= AV_PKT_FLAG_KEY; |
| pkt->pts = pd.pts; |
| pkt->stream_index = pd.stream; |
| pkt->pos = avio_tell(avf->pb); |
| |
| ret = nut_read_frame(priv->nut, &pd.len, pkt->data); |
| |
| return ret; |
| } |
| |
| static int nut_read_seek(AVFormatContext * avf, int stream_index, int64_t target_ts, int flags) { |
| NUTContext * priv = avf->priv_data; |
| int active_streams[] = { stream_index, -1 }; |
| double time_pos = target_ts * priv->s[stream_index].time_base.num / (double)priv->s[stream_index].time_base.den; |
| |
| if (nut_seek(priv->nut, time_pos, 2*!(flags & AVSEEK_FLAG_BACKWARD), active_streams)) return -1; |
| |
| return 0; |
| } |
| |
| static int nut_read_close(AVFormatContext *s) { |
| NUTContext * priv = s->priv_data; |
| |
| nut_demuxer_uninit(priv->nut); |
| |
| return 0; |
| } |
| |
| AVInputFormat ff_libnut_demuxer = { |
| .name = "libnut", |
| .long_name = NULL_IF_CONFIG_SMALL("NUT format"), |
| .priv_data_size = sizeof(NUTContext), |
| .read_probe = nut_probe, |
| .read_header = nut_read_header, |
| .read_packet = nut_read_packet, |
| .read_close = nut_read_close, |
| .read_seek = nut_read_seek, |
| .extensions = "nut", |
| }; |