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00028 #include "avformat.h"
00029 #include "internal.h"
00030 #include "riff.h"
00031 #include <libnut.h>
00032
00033 #define ID_STRING "nut/multimedia container"
00034 #define ID_LENGTH (strlen(ID_STRING) + 1)
00035
00036 typedef struct {
00037 nut_context_tt * nut;
00038 nut_stream_header_tt * s;
00039 } NUTContext;
00040
00041 static const AVCodecTag nut_tags[] = {
00042 { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
00043 { CODEC_ID_MP3, MKTAG('m', 'p', '3', ' ') },
00044 { CODEC_ID_VORBIS, MKTAG('v', 'r', 'b', 's') },
00045 { 0, 0 },
00046 };
00047
00048 #if CONFIG_LIBNUT_MUXER
00049 static int av_write(void * h, size_t len, const uint8_t * buf) {
00050 AVIOContext * bc = h;
00051 avio_write(bc, buf, len);
00052
00053 return len;
00054 }
00055
00056 static int nut_write_header(AVFormatContext * avf) {
00057 NUTContext * priv = avf->priv_data;
00058 AVIOContext * bc = avf->pb;
00059 nut_muxer_opts_tt mopts = {
00060 .output = {
00061 .priv = bc,
00062 .write = av_write,
00063 },
00064 .alloc = { av_malloc, av_realloc, av_free },
00065 .write_index = 1,
00066 .realtime_stream = 0,
00067 .max_distance = 32768,
00068 .fti = NULL,
00069 };
00070 nut_stream_header_tt * s;
00071 int i;
00072
00073 priv->s = s = av_mallocz((avf->nb_streams + 1) * sizeof*s);
00074
00075 for (i = 0; i < avf->nb_streams; i++) {
00076 AVCodecContext * codec = avf->streams[i]->codec;
00077 int j;
00078 int fourcc = 0;
00079 int num, denom, ssize;
00080
00081 s[i].type = codec->codec_type == AVMEDIA_TYPE_VIDEO ? NUT_VIDEO_CLASS : NUT_AUDIO_CLASS;
00082
00083 if (codec->codec_tag) fourcc = codec->codec_tag;
00084 else fourcc = ff_codec_get_tag(nut_tags, codec->codec_id);
00085
00086 if (!fourcc) {
00087 if (codec->codec_type == AVMEDIA_TYPE_VIDEO) fourcc = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id);
00088 if (codec->codec_type == AVMEDIA_TYPE_AUDIO) fourcc = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
00089 }
00090
00091 s[i].fourcc_len = 4;
00092 s[i].fourcc = av_malloc(s[i].fourcc_len);
00093 for (j = 0; j < s[i].fourcc_len; j++) s[i].fourcc[j] = (fourcc >> (j*8)) & 0xFF;
00094
00095 ff_parse_specific_params(codec, &num, &ssize, &denom);
00096 avpriv_set_pts_info(avf->streams[i], 60, denom, num);
00097
00098 s[i].time_base.num = denom;
00099 s[i].time_base.den = num;
00100
00101 s[i].fixed_fps = 0;
00102 s[i].decode_delay = codec->has_b_frames;
00103 s[i].codec_specific_len = codec->extradata_size;
00104 s[i].codec_specific = codec->extradata;
00105
00106 if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00107 s[i].width = codec->width;
00108 s[i].height = codec->height;
00109 s[i].sample_width = 0;
00110 s[i].sample_height = 0;
00111 s[i].colorspace_type = 0;
00112 } else {
00113 s[i].samplerate_num = codec->sample_rate;
00114 s[i].samplerate_denom = 1;
00115 s[i].channel_count = codec->channels;
00116 }
00117 }
00118
00119 s[avf->nb_streams].type = -1;
00120 priv->nut = nut_muxer_init(&mopts, s, NULL);
00121
00122 return 0;
00123 }
00124
00125 static int nut_write_packet(AVFormatContext * avf, AVPacket * pkt) {
00126 NUTContext * priv = avf->priv_data;
00127 nut_packet_tt p;
00128
00129 p.len = pkt->size;
00130 p.stream = pkt->stream_index;
00131 p.pts = pkt->pts;
00132 p.flags = pkt->flags & AV_PKT_FLAG_KEY ? NUT_FLAG_KEY : 0;
00133 p.next_pts = 0;
00134
00135 nut_write_frame_reorder(priv->nut, &p, pkt->data);
00136
00137 return 0;
00138 }
00139
00140 static int nut_write_trailer(AVFormatContext * avf) {
00141 AVIOContext * bc = avf->pb;
00142 NUTContext * priv = avf->priv_data;
00143 int i;
00144
00145 nut_muxer_uninit_reorder(priv->nut);
00146 avio_flush(bc);
00147
00148 for(i = 0; priv->s[i].type != -1; i++ ) av_freep(&priv->s[i].fourcc);
00149 av_freep(&priv->s);
00150
00151 return 0;
00152 }
00153
00154 AVOutputFormat ff_libnut_muxer = {
00155 .name = "libnut",
00156 .long_name = "nut format",
00157 .mime_type = "video/x-nut",
00158 .extensions = "nut",
00159 .priv_data_size = sizeof(NUTContext),
00160 .audio_codec = CODEC_ID_VORBIS,
00161 .video_codec = CODEC_ID_MPEG4,
00162 .write_header = nut_write_header,
00163 .write_packet = nut_write_packet,
00164 .write_trailer = nut_write_trailer,
00165 .flags = AVFMT_GLOBALHEADER,
00166 };
00167 #endif
00168
00169 static int nut_probe(AVProbeData *p) {
00170 if (!memcmp(p->buf, ID_STRING, ID_LENGTH)) return AVPROBE_SCORE_MAX;
00171
00172 return 0;
00173 }
00174
00175 static size_t av_read(void * h, size_t len, uint8_t * buf) {
00176 AVIOContext * bc = h;
00177 return avio_read(bc, buf, len);
00178 }
00179
00180 static off_t av_seek(void * h, long long pos, int whence) {
00181 AVIOContext * bc = h;
00182 if (whence == SEEK_END) {
00183 pos = avio_size(bc) + pos;
00184 whence = SEEK_SET;
00185 }
00186 return avio_seek(bc, pos, whence);
00187 }
00188
00189 static int nut_read_header(AVFormatContext * avf, AVFormatParameters * ap) {
00190 NUTContext * priv = avf->priv_data;
00191 AVIOContext * bc = avf->pb;
00192 nut_demuxer_opts_tt dopts = {
00193 .input = {
00194 .priv = bc,
00195 .seek = av_seek,
00196 .read = av_read,
00197 .eof = NULL,
00198 .file_pos = 0,
00199 },
00200 .alloc = { av_malloc, av_realloc, av_free },
00201 .read_index = 1,
00202 .cache_syncpoints = 1,
00203 };
00204 nut_context_tt * nut = priv->nut = nut_demuxer_init(&dopts);
00205 nut_stream_header_tt * s;
00206 int ret, i;
00207
00208 if ((ret = nut_read_headers(nut, &s, NULL))) {
00209 av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(ret));
00210 nut_demuxer_uninit(nut);
00211 return -1;
00212 }
00213
00214 priv->s = s;
00215
00216 for (i = 0; s[i].type != -1 && i < 2; i++) {
00217 AVStream * st = avformat_new_stream(avf, NULL);
00218 int j;
00219
00220 for (j = 0; j < s[i].fourcc_len && j < 8; j++) st->codec->codec_tag |= s[i].fourcc[j]<<(j*8);
00221
00222 st->codec->has_b_frames = s[i].decode_delay;
00223
00224 st->codec->extradata_size = s[i].codec_specific_len;
00225 if (st->codec->extradata_size) {
00226 st->codec->extradata = av_mallocz(st->codec->extradata_size);
00227 memcpy(st->codec->extradata, s[i].codec_specific, st->codec->extradata_size);
00228 }
00229
00230 avpriv_set_pts_info(avf->streams[i], 60, s[i].time_base.num, s[i].time_base.den);
00231 st->start_time = 0;
00232 st->duration = s[i].max_pts;
00233
00234 st->codec->codec_id = ff_codec_get_id(nut_tags, st->codec->codec_tag);
00235
00236 switch(s[i].type) {
00237 case NUT_AUDIO_CLASS:
00238 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00239 if (st->codec->codec_id == CODEC_ID_NONE) st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, st->codec->codec_tag);
00240
00241 st->codec->channels = s[i].channel_count;
00242 st->codec->sample_rate = s[i].samplerate_num / s[i].samplerate_denom;
00243 break;
00244 case NUT_VIDEO_CLASS:
00245 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00246 if (st->codec->codec_id == CODEC_ID_NONE) st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag);
00247
00248 st->codec->width = s[i].width;
00249 st->codec->height = s[i].height;
00250 st->sample_aspect_ratio.num = s[i].sample_width;
00251 st->sample_aspect_ratio.den = s[i].sample_height;
00252 break;
00253 }
00254 if (st->codec->codec_id == CODEC_ID_NONE) av_log(avf, AV_LOG_ERROR, "Unknown codec?!\n");
00255 }
00256
00257 return 0;
00258 }
00259
00260 static int nut_read_packet(AVFormatContext * avf, AVPacket * pkt) {
00261 NUTContext * priv = avf->priv_data;
00262 nut_packet_tt pd;
00263 int ret;
00264
00265 ret = nut_read_next_packet(priv->nut, &pd);
00266
00267 if (ret || av_new_packet(pkt, pd.len) < 0) {
00268 if (ret != NUT_ERR_EOF)
00269 av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(ret));
00270 return -1;
00271 }
00272
00273 if (pd.flags & NUT_FLAG_KEY) pkt->flags |= AV_PKT_FLAG_KEY;
00274 pkt->pts = pd.pts;
00275 pkt->stream_index = pd.stream;
00276 pkt->pos = avio_tell(avf->pb);
00277
00278 ret = nut_read_frame(priv->nut, &pd.len, pkt->data);
00279
00280 return ret;
00281 }
00282
00283 static int nut_read_seek(AVFormatContext * avf, int stream_index, int64_t target_ts, int flags) {
00284 NUTContext * priv = avf->priv_data;
00285 int active_streams[] = { stream_index, -1 };
00286 double time_pos = target_ts * priv->s[stream_index].time_base.num / (double)priv->s[stream_index].time_base.den;
00287
00288 if (nut_seek(priv->nut, time_pos, 2*!(flags & AVSEEK_FLAG_BACKWARD), active_streams)) return -1;
00289
00290 return 0;
00291 }
00292
00293 static int nut_read_close(AVFormatContext *s) {
00294 NUTContext * priv = s->priv_data;
00295
00296 nut_demuxer_uninit(priv->nut);
00297
00298 return 0;
00299 }
00300
00301 AVInputFormat ff_libnut_demuxer = {
00302 .name = "libnut",
00303 .long_name = NULL_IF_CONFIG_SMALL("NUT format"),
00304 .priv_data_size = sizeof(NUTContext),
00305 .read_probe = nut_probe,
00306 .read_header = nut_read_header,
00307 .read_packet = nut_read_packet,
00308 .read_close = nut_read_close,
00309 .read_seek = nut_read_seek,
00310 .extensions = "nut",
00311 };