2 * NUT (de)muxing via libnut
3 * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * NUT demuxing and muxing via libnut.
25 * @author Oded Shimon <ods15@ods15.dyndns.org>
33 #define ID_STRING "nut/multimedia container"
34 #define ID_LENGTH (strlen(ID_STRING) + 1)
38 nut_stream_header_tt * s;
41 static const AVCodecTag nut_tags[] = {
42 { AV_CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
43 { AV_CODEC_ID_MP3, MKTAG('m', 'p', '3', ' ') },
44 { AV_CODEC_ID_VORBIS, MKTAG('v', 'r', 'b', 's') },
48 #if CONFIG_LIBNUT_MUXER
49 static int av_write(void * h, size_t len, const uint8_t * buf) {
51 avio_write(bc, buf, len);
56 static int nut_write_header(AVFormatContext * avf) {
57 NUTContext * priv = avf->priv_data;
58 AVIOContext * bc = avf->pb;
59 nut_muxer_opts_tt mopts = {
64 .alloc = { av_malloc, av_realloc, av_free },
67 .max_distance = 32768,
70 nut_stream_header_tt * s;
73 priv->s = s = av_mallocz_array(avf->nb_streams + 1, sizeof*s);
75 return AVERROR(ENOMEM);
77 for (i = 0; i < avf->nb_streams; i++) {
78 AVCodecParameters *par = avf->streams[i]->codecpar;
81 int num, denom, ssize;
83 s[i].type = par->codec_type == AVMEDIA_TYPE_VIDEO ? NUT_VIDEO_CLASS : NUT_AUDIO_CLASS;
85 if (par->codec_tag) fourcc = par->codec_tag;
86 else fourcc = ff_codec_get_tag(nut_tags, par->codec_id);
89 if (par->codec_type == AVMEDIA_TYPE_VIDEO) fourcc = ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id);
90 if (par->codec_type == AVMEDIA_TYPE_AUDIO) fourcc = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
94 s[i].fourcc = av_malloc(s[i].fourcc_len);
95 for (j = 0; j < s[i].fourcc_len; j++) s[i].fourcc[j] = (fourcc >> (j*8)) & 0xFF;
97 ff_parse_specific_params(codec, &num, &ssize, &denom);
98 avpriv_set_pts_info(avf->streams[i], 60, denom, num);
100 s[i].time_base.num = denom;
101 s[i].time_base.den = num;
104 s[i].decode_delay = par->video_delay;
105 s[i].codec_specific_len = par->extradata_size;
106 s[i].codec_specific = par->extradata;
108 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
109 s[i].width = par->width;
110 s[i].height = par->height;
111 s[i].sample_width = 0;
112 s[i].sample_height = 0;
113 s[i].colorspace_type = 0;
115 s[i].samplerate_num = par->sample_rate;
116 s[i].samplerate_denom = 1;
117 s[i].channel_count = par->channels;
121 s[avf->nb_streams].type = -1;
122 priv->nut = nut_muxer_init(&mopts, s, NULL);
127 static int nut_write_packet(AVFormatContext * avf, AVPacket * pkt) {
128 NUTContext * priv = avf->priv_data;
132 p.stream = pkt->stream_index;
134 p.flags = pkt->flags & AV_PKT_FLAG_KEY ? NUT_FLAG_KEY : 0;
137 nut_write_frame_reorder(priv->nut, &p, pkt->data);
142 static int nut_write_trailer(AVFormatContext * avf) {
143 AVIOContext * bc = avf->pb;
144 NUTContext * priv = avf->priv_data;
147 nut_muxer_uninit_reorder(priv->nut);
150 for(i = 0; priv->s[i].type != -1; i++ ) av_freep(&priv->s[i].fourcc);
156 AVOutputFormat ff_libnut_muxer = {
158 .long_name = "nut format",
159 .mime_type = "video/x-nut",
161 .priv_data_size = sizeof(NUTContext),
162 .audio_codec = AV_CODEC_ID_VORBIS,
163 .video_codec = AV_CODEC_ID_MPEG4,
164 .write_header = nut_write_header,
165 .write_packet = nut_write_packet,
166 .write_trailer = nut_write_trailer,
167 .flags = AVFMT_GLOBALHEADER,
169 #endif /* CONFIG_LIBNUT_MUXER */
171 static int nut_probe(AVProbeData *p) {
172 if (!memcmp(p->buf, ID_STRING, ID_LENGTH)) return AVPROBE_SCORE_MAX;
177 static size_t av_read(void * h, size_t len, uint8_t * buf) {
178 AVIOContext * bc = h;
179 return avio_read(bc, buf, len);
182 static off_t av_seek(void * h, int64_t pos, int whence) {
183 AVIOContext * bc = h;
184 if (whence == SEEK_END) {
185 pos = avio_size(bc) + pos;
188 return avio_seek(bc, pos, whence);
191 static int nut_read_header(AVFormatContext * avf) {
192 NUTContext * priv = avf->priv_data;
193 AVIOContext * bc = avf->pb;
194 nut_demuxer_opts_tt dopts = {
202 .alloc = { av_malloc, av_realloc, av_free },
204 .cache_syncpoints = 1,
206 nut_context_tt * nut = priv->nut = nut_demuxer_init(&dopts);
207 nut_stream_header_tt * s;
213 if ((ret = nut_read_headers(nut, &s, NULL))) {
214 av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(ret));
215 nut_demuxer_uninit(nut);
222 for (i = 0; s[i].type != -1 && i < 2; i++) {
223 AVStream * st = avformat_new_stream(avf, NULL);
227 return AVERROR(ENOMEM);
229 for (j = 0; j < s[i].fourcc_len && j < 8; j++) st->codecpar->codec_tag |= s[i].fourcc[j]<<(j*8);
231 st->codecpar->video_delay = s[i].decode_delay;
233 st->codecpar->extradata_size = s[i].codec_specific_len;
234 if (st->codecpar->extradata_size) {
235 if(ff_alloc_extradata(st->codecpar, st->codecpar->extradata_size)){
236 nut_demuxer_uninit(nut);
238 return AVERROR(ENOMEM);
240 memcpy(st->codecpar->extradata, s[i].codec_specific, st->codecpar->extradata_size);
243 avpriv_set_pts_info(avf->streams[i], 60, s[i].time_base.num, s[i].time_base.den);
245 st->duration = s[i].max_pts;
247 st->codecpar->codec_id = ff_codec_get_id(nut_tags, st->codecpar->codec_tag);
250 case NUT_AUDIO_CLASS:
251 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
252 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) st->codecpar->codec_id = ff_codec_get_id(ff_codec_wav_tags, st->codecpar->codec_tag);
254 st->codecpar->channels = s[i].channel_count;
255 st->codecpar->sample_rate = s[i].samplerate_num / s[i].samplerate_denom;
257 case NUT_VIDEO_CLASS:
258 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
259 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codecpar->codec_tag);
261 st->codecpar->width = s[i].width;
262 st->codecpar->height = s[i].height;
263 st->sample_aspect_ratio.num = s[i].sample_width;
264 st->sample_aspect_ratio.den = s[i].sample_height;
267 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) av_log(avf, AV_LOG_ERROR, "Unknown codec?!\n");
273 static int nut_read_packet(AVFormatContext * avf, AVPacket * pkt) {
274 NUTContext * priv = avf->priv_data;
278 ret = nut_read_next_packet(priv->nut, &pd);
280 if (ret || av_new_packet(pkt, pd.len) < 0) {
281 if (ret != NUT_ERR_EOF)
282 av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(ret));
286 if (pd.flags & NUT_FLAG_KEY) pkt->flags |= AV_PKT_FLAG_KEY;
288 pkt->stream_index = pd.stream;
289 pkt->pos = avio_tell(avf->pb);
291 ret = nut_read_frame(priv->nut, &pd.len, pkt->data);
296 static int nut_read_seek(AVFormatContext * avf, int stream_index, int64_t target_ts, int flags) {
297 NUTContext * priv = avf->priv_data;
298 int active_streams[] = { stream_index, -1 };
299 double time_pos = target_ts * priv->s[stream_index].time_base.num / (double)priv->s[stream_index].time_base.den;
301 if (nut_seek(priv->nut, time_pos, 2*!(flags & AVSEEK_FLAG_BACKWARD), active_streams)) return -1;
306 static int nut_read_close(AVFormatContext *s) {
307 NUTContext * priv = s->priv_data;
309 nut_demuxer_uninit(priv->nut);
314 AVInputFormat ff_libnut_demuxer = {
316 .long_name = NULL_IF_CONFIG_SMALL("NUT format"),
317 .priv_data_size = sizeof(NUTContext),
318 .read_probe = nut_probe,
319 .read_header = nut_read_header,
320 .read_packet = nut_read_packet,
321 .read_close = nut_read_close,
322 .read_seek = nut_read_seek,