mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-15 03:34:56 +00:00
309 lines
9.8 KiB
C
309 lines
9.8 KiB
C
#include "avformat.h"
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#include "riff.h"
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#include "nut.h"
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#define ID_STRING "nut/multimedia container"
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#define ID_LENGTH (strlen(ID_STRING) + 1)
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typedef struct {
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nut_context_t * nut;
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nut_stream_header_t * s;
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} NUTContext;
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static const CodecTag nut_tags[] = {
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{ CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 's') },
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{ CODEC_ID_MP3, MKTAG('m', 'p', '3', ' ') },
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{ CODEC_ID_VORBIS, MKTAG('v', 'r', 'b', 's') },
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{ 0, 0 },
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};
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#ifdef CONFIG_MUXERS
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frame_table_input_t ft_default[] = {
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// There must be atleast this safety net:
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//{ 4128, 3, 0, 1, 0, 0, 0 },
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//{ flag, fields, pts, mul, stream, size, count }
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{ 8192, 0, 0, 1, 0, 0, 0 }, // invalid 0x00
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{ 56, 0, 0, 1, 0, 0, 0 }, // safety net non key frame
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{ 56, 0, 0, 1, 0, 0, 0 }, // safety net key frame
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{ 4128, 0, 0, 1, 0, 0, 0 }, // one more safety net
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{ 27, 0, 0, 1, 0, 0, 0 }, // EOR frame
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{ 1, 4, 1, 337, 1, 336, 0 }, // used 82427 times
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{ 1, 4, 1, 385, 1, 384, 0 }, // used 56044 times
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{ 0, 4, 2, 7, 0, 6, 0 }, // used 20993 times
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{ 0, 4, 1, 7, 0, 6, 0 }, // used 10398 times
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{ 1, 4, 1, 481, 1, 480, 0 }, // used 3527 times
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{ 1, 4, 1, 289, 1, 288, 0 }, // used 2042 times
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{ 1, 4, 1, 577, 1, 576, 0 }, // used 1480 times
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{ 1, 4, 1, 673, 1, 672, 0 }, // used 862 times
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{ 1, 4, 1, 769, 1, 768, 0 }, // used 433 times
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{ 1, 4, 1, 961, 1, 960, 0 }, // used 191 times
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{ 32, 3, 2, 101, 0, 0, 0 }, // "1.2.0" => 14187
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{ 32, 3, -1, 40, 0, 0, 0 }, // "1.-1.0" => 5707
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{ 32, 3, 1, 81, 0, 0, 0 }, // "1.1.0" => 11159
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{ 33, 3, 1, 11, 0, 0, 0 }, // "1.1.1" => 1409
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{ 105, 3, 0, 6, 0, 0, 0 }, // checksum for video
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{ 8192, 2, 0, 1, 0, 0, 0 }, // invalid 0xFF
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{ -1, 0, 0, 0, 0, 0, 0 }, // end
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};
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static int av_write(void * h, size_t len, const uint8_t * buf) {
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ByteIOContext * bc = h;
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put_buffer(bc, buf, len);
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//put_flush_packet(bc);
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return len;
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}
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static int nut_write_header(AVFormatContext * avf) {
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NUTContext * priv = avf->priv_data;
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ByteIOContext * bc = &avf->pb;
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nut_muxer_opts_t mopts = {
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.output = {
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.priv = bc,
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.write = av_write,
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},
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.alloc = { av_malloc, av_realloc, av_free },
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.write_index = 1,
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.realtime_stream = 0,
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.max_distance = 32768,
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.fti = ft_default
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};
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nut_stream_header_t * s;
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int i;
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priv->s = s = av_mallocz((avf->nb_streams + 1) * sizeof*s);
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for (i = 0; i < avf->nb_streams; i++) {
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AVCodecContext * codec = avf->streams[i]->codec;
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int j;
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int fourcc = 0;
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int nom, denom, ssize;
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s[i].type = codec->codec_type == CODEC_TYPE_VIDEO ? NUT_VIDEO_CLASS : NUT_AUDIO_CLASS;
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if (codec->codec_tag) fourcc = codec->codec_tag;
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else fourcc = codec_get_tag(nut_tags, codec->codec_id);
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if (!fourcc) {
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if (codec->codec_type == CODEC_TYPE_VIDEO) fourcc = codec_get_bmp_tag(codec->codec_id);
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if (codec->codec_type == CODEC_TYPE_AUDIO) fourcc = codec_get_wav_tag(codec->codec_id);
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}
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s[i].fourcc_len = 4;
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s[i].fourcc = av_malloc(s[i].fourcc_len);
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for (j = 0; j < s[i].fourcc_len; j++) s[i].fourcc[j] = (fourcc >> (j*8)) & 0xFF;
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ff_parse_specific_params(codec, &nom, &ssize, &denom);
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av_set_pts_info(avf->streams[i], 60, denom, nom);
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s[i].time_base.nom = denom;
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s[i].time_base.den = nom;
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s[i].fixed_fps = 0;
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s[i].decode_delay = codec->has_b_frames;
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s[i].codec_specific_len = codec->extradata_size;
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s[i].codec_specific = codec->extradata;
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if (codec->codec_type == CODEC_TYPE_VIDEO) {
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s[i].width = codec->width;
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s[i].height = codec->height;
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s[i].sample_width = 0;
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s[i].sample_height = 0;
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s[i].colorspace_type = 0;
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} else {
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s[i].samplerate_nom = codec->sample_rate;
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s[i].samplerate_denom = 1;
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s[i].channel_count = codec->channels;
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}
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}
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s[avf->nb_streams].type = -1;
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priv->nut = nut_muxer_init(&mopts, s, NULL);
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return 0;
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}
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static int nut_write_packet(AVFormatContext * avf, AVPacket * pkt) {
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NUTContext * priv = avf->priv_data;
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nut_packet_t p;
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p.len = pkt->size;
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p.stream = pkt->stream_index;
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p.pts = pkt->pts;
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p.flags = pkt->flags & PKT_FLAG_KEY ? NUT_FLAG_KEY : 0;
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p.next_pts = 0;
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nut_write_frame_reorder(priv->nut, &p, pkt->data);
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return 0;
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}
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static int nut_write_trailer(AVFormatContext * avf) {
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ByteIOContext * bc = &avf->pb;
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NUTContext * priv = avf->priv_data;
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int i;
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nut_muxer_uninit_reorder(priv->nut);
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put_flush_packet(bc);
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for(i = 0; priv->s[i].type != -1; i++ ) av_freep(&priv->s[i].fourcc);
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av_freep(&priv->s);
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return 0;
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}
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AVOutputFormat nut_muxer = {
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"nut",
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"nut format",
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"video/x-nut",
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"nut",
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sizeof(NUTContext),
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CODEC_ID_VORBIS,
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CODEC_ID_MPEG4,
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nut_write_header,
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nut_write_packet,
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nut_write_trailer,
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.flags = AVFMT_GLOBALHEADER,
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};
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#endif //CONFIG_MUXERS
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static int nut_probe(AVProbeData *p) {
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if (p->buf_size >= ID_LENGTH && !memcmp(p->buf, ID_STRING, ID_LENGTH)) return AVPROBE_SCORE_MAX;
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return 0;
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}
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static size_t av_read(void * h, size_t len, uint8_t * buf) {
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ByteIOContext * bc = h;
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return get_buffer(bc, buf, len);
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}
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static off_t av_seek(void * h, long long pos, int whence) {
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ByteIOContext * bc = h;
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if (whence == SEEK_END) {
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pos = url_fsize(bc) + pos;
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whence = SEEK_SET;
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}
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return url_fseek(bc, pos, whence);
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}
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static int nut_read_header(AVFormatContext * avf, AVFormatParameters * ap) {
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NUTContext * priv = avf->priv_data;
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ByteIOContext * bc = &avf->pb;
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nut_demuxer_opts_t dopts = {
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.input = {
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.priv = bc,
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.seek = av_seek,
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.read = av_read,
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.eof = NULL,
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.file_pos = 0,
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},
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.alloc = { av_malloc, av_realloc, av_free },
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.read_index = 1
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};
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nut_context_t * nut = priv->nut = nut_demuxer_init(&dopts);
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nut_stream_header_t * s;
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int ret, i;
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if ((ret = nut_read_headers(nut, &s, NULL))) {
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if (ret < 0) av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(-ret));
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nut_demuxer_uninit(nut);
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return -1;
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}
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priv->s = s;
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for (i = 0; s[i].type != -1 && i < 2; i++) {
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AVStream * st = av_new_stream(avf, i);
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int j;
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for (j = 0; j < s[i].fourcc_len && j < 8; j++) st->codec->codec_tag |= s[i].fourcc[j]<<(j*8);
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st->codec->has_b_frames = s[i].decode_delay;
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st->codec->extradata_size = s[i].codec_specific_len;
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if (st->codec->extradata_size) {
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st->codec->extradata = av_mallocz(st->codec->extradata_size);
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memcpy(st->codec->extradata, s[i].codec_specific, st->codec->extradata_size);
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}
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av_set_pts_info(avf->streams[i], 60, s[i].time_base.nom, s[i].time_base.den);
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st->start_time = 0;
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st->duration = s[i].max_pts;
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st->codec->codec_id = codec_get_id(nut_tags, st->codec->codec_tag);
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switch(s[i].type) {
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case NUT_AUDIO_CLASS:
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st->codec->codec_type = CODEC_TYPE_AUDIO;
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if (st->codec->codec_id == CODEC_ID_NONE) st->codec->codec_id = codec_get_wav_id(st->codec->codec_tag);
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st->codec->channels = s[i].channel_count;
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st->codec->sample_rate = s[i].samplerate_nom / s[i].samplerate_denom;
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break;
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case NUT_VIDEO_CLASS:
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st->codec->codec_type = CODEC_TYPE_VIDEO;
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if (st->codec->codec_id == CODEC_ID_NONE) st->codec->codec_id = codec_get_bmp_id(st->codec->codec_tag);
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st->codec->width = s[i].width;
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st->codec->height = s[i].height;
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st->codec->sample_aspect_ratio.num = s[i].sample_width;
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st->codec->sample_aspect_ratio.den = s[i].sample_height;
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break;
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}
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if (st->codec->codec_id == CODEC_ID_NONE) av_log(avf, AV_LOG_ERROR, "Unknown codec?!\n");
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}
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return 0;
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}
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static int nut_read_packet(AVFormatContext * avf, AVPacket * pkt) {
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NUTContext * priv = avf->priv_data;
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nut_packet_t pd;
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int ret;
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while ((ret = nut_read_next_packet(priv->nut, &pd)) < 0)
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av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(-ret));
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if (ret || av_new_packet(pkt, pd.len) < 0) return -1;
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if (pd.flags & NUT_FLAG_KEY) pkt->flags |= PKT_FLAG_KEY;
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pkt->pts = pd.pts;
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pkt->stream_index = pd.stream;
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pkt->pos = url_ftell(&avf->pb);
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ret = nut_read_frame(priv->nut, &pd.len, pkt->data);
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return ret;
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}
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static int nut_read_seek(AVFormatContext * avf, int stream_index, int64_t target_ts, int flags) {
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NUTContext * priv = avf->priv_data;
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int active_streams[] = { stream_index, -1 };
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double time_pos = target_ts * priv->s[stream_index].time_base.nom / (double)priv->s[stream_index].time_base.den;
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if (nut_seek(priv->nut, time_pos, 2*!(flags & AVSEEK_FLAG_BACKWARD), active_streams)) return -1;
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return 0;
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}
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static int nut_read_close(AVFormatContext *s) {
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NUTContext * priv = s->priv_data;
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nut_demuxer_uninit(priv->nut);
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av_free(priv->s);
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return 0;
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}
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AVInputFormat nut_demuxer = {
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"nut",
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"nut format",
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sizeof(NUTContext),
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nut_probe,
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nut_read_header,
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nut_read_packet,
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nut_read_close,
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nut_read_seek,
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.extensions = "nut",
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};
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