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Diffstat (limited to 'ffmpeg1/libavformat/nuv.c')
-rw-r--r--ffmpeg1/libavformat/nuv.c392
1 files changed, 392 insertions, 0 deletions
diff --git a/ffmpeg1/libavformat/nuv.c b/ffmpeg1/libavformat/nuv.c
new file mode 100644
index 0000000..fc9e916
--- /dev/null
+++ b/ffmpeg1/libavformat/nuv.c
@@ -0,0 +1,392 @@
+/*
+ * NuppelVideo demuxer.
+ * Copyright (c) 2006 Reimar Doeffinger
+ *
+ * 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
+ */
+
+#include "libavutil/channel_layout.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/intfloat.h"
+#include "avformat.h"
+#include "internal.h"
+#include "riff.h"
+
+static const AVCodecTag nuv_audio_tags[] = {
+ { AV_CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
+ { AV_CODEC_ID_MP3, MKTAG('L', 'A', 'M', 'E') },
+ { AV_CODEC_ID_NONE, 0 },
+};
+
+typedef struct {
+ int v_id;
+ int a_id;
+ int rtjpg_video;
+} NUVContext;
+
+typedef enum {
+ NUV_VIDEO = 'V',
+ NUV_EXTRADATA = 'D',
+ NUV_AUDIO = 'A',
+ NUV_SEEKP = 'R',
+ NUV_MYTHEXT = 'X'
+} nuv_frametype;
+
+static int nuv_probe(AVProbeData *p)
+{
+ if (!memcmp(p->buf, "NuppelVideo", 12))
+ return AVPROBE_SCORE_MAX;
+ if (!memcmp(p->buf, "MythTVVideo", 12))
+ return AVPROBE_SCORE_MAX;
+ return 0;
+}
+
+/// little macro to sanitize packet size
+#define PKTSIZE(s) (s & 0xffffff)
+
+/**
+ * @brief read until we found all data needed for decoding
+ * @param vst video stream of which to change parameters
+ * @param ast video stream of which to change parameters
+ * @param myth set if this is a MythTVVideo format file
+ * @return 0 or AVERROR code
+ */
+static int get_codec_data(AVIOContext *pb, AVStream *vst,
+ AVStream *ast, int myth)
+{
+ nuv_frametype frametype;
+
+ if (!vst && !myth)
+ return 1; // no codec data needed
+ while (!url_feof(pb)) {
+ int size, subtype;
+
+ frametype = avio_r8(pb);
+ switch (frametype) {
+ case NUV_EXTRADATA:
+ subtype = avio_r8(pb);
+ avio_skip(pb, 6);
+ size = PKTSIZE(avio_rl32(pb));
+ if (vst && subtype == 'R') {
+ if (vst->codec->extradata) {
+ av_freep(&vst->codec->extradata);
+ vst->codec->extradata_size = 0;
+ }
+ vst->codec->extradata = av_malloc(size);
+ if (!vst->codec->extradata)
+ return AVERROR(ENOMEM);
+ vst->codec->extradata_size = size;
+ avio_read(pb, vst->codec->extradata, size);
+ size = 0;
+ if (!myth)
+ return 0;
+ }
+ break;
+ case NUV_MYTHEXT:
+ avio_skip(pb, 7);
+ size = PKTSIZE(avio_rl32(pb));
+ if (size != 128 * 4)
+ break;
+ avio_rl32(pb); // version
+ if (vst) {
+ vst->codec->codec_tag = avio_rl32(pb);
+ vst->codec->codec_id =
+ ff_codec_get_id(ff_codec_bmp_tags, vst->codec->codec_tag);
+ if (vst->codec->codec_tag == MKTAG('R', 'J', 'P', 'G'))
+ vst->codec->codec_id = AV_CODEC_ID_NUV;
+ } else
+ avio_skip(pb, 4);
+
+ if (ast) {
+ int id;
+
+ ast->codec->codec_tag = avio_rl32(pb);
+ ast->codec->sample_rate = avio_rl32(pb);
+ ast->codec->bits_per_coded_sample = avio_rl32(pb);
+ ast->codec->channels = avio_rl32(pb);
+ ast->codec->channel_layout = 0;
+
+ id = ff_wav_codec_get_id(ast->codec->codec_tag,
+ ast->codec->bits_per_coded_sample);
+ if (id == AV_CODEC_ID_NONE) {
+ id = ff_codec_get_id(nuv_audio_tags, ast->codec->codec_tag);
+ if (id == AV_CODEC_ID_PCM_S16LE)
+ id = ff_get_pcm_codec_id(ast->codec->bits_per_coded_sample,
+ 0, 0, ~1);
+ }
+ ast->codec->codec_id = id;
+
+ ast->need_parsing = AVSTREAM_PARSE_FULL;
+ } else
+ avio_skip(pb, 4 * 4);
+
+ size -= 6 * 4;
+ avio_skip(pb, size);
+ return 0;
+ case NUV_SEEKP:
+ size = 11;
+ break;
+ default:
+ avio_skip(pb, 7);
+ size = PKTSIZE(avio_rl32(pb));
+ break;
+ }
+ avio_skip(pb, size);
+ }
+
+ return 0;
+}
+
+static int nuv_header(AVFormatContext *s)
+{
+ NUVContext *ctx = s->priv_data;
+ AVIOContext *pb = s->pb;
+ char id_string[12];
+ double aspect, fps;
+ int is_mythtv, width, height, v_packs, a_packs, ret;
+ AVStream *vst = NULL, *ast = NULL;
+
+ avio_read(pb, id_string, 12);
+ is_mythtv = !memcmp(id_string, "MythTVVideo", 12);
+ avio_skip(pb, 5); // version string
+ avio_skip(pb, 3); // padding
+ width = avio_rl32(pb);
+ height = avio_rl32(pb);
+ avio_rl32(pb); // unused, "desiredwidth"
+ avio_rl32(pb); // unused, "desiredheight"
+ avio_r8(pb); // 'P' == progressive, 'I' == interlaced
+ avio_skip(pb, 3); // padding
+ aspect = av_int2double(avio_rl64(pb));
+ if (aspect > 0.9999 && aspect < 1.0001)
+ aspect = 4.0 / 3.0;
+ fps = av_int2double(avio_rl64(pb));
+
+ // number of packets per stream type, -1 means unknown, e.g. streaming
+ v_packs = avio_rl32(pb);
+ a_packs = avio_rl32(pb);
+ avio_rl32(pb); // text
+
+ avio_rl32(pb); // keyframe distance (?)
+
+ if (v_packs) {
+ vst = avformat_new_stream(s, NULL);
+ if (!vst)
+ return AVERROR(ENOMEM);
+ ctx->v_id = vst->index;
+
+ vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ vst->codec->codec_id = AV_CODEC_ID_NUV;
+ vst->codec->width = width;
+ vst->codec->height = height;
+ vst->codec->bits_per_coded_sample = 10;
+ vst->sample_aspect_ratio = av_d2q(aspect * height / width,
+ 10000);
+#if FF_API_R_FRAME_RATE
+ vst->r_frame_rate =
+#endif
+ vst->avg_frame_rate = av_d2q(fps, 60000);
+ avpriv_set_pts_info(vst, 32, 1, 1000);
+ } else
+ ctx->v_id = -1;
+
+ if (a_packs) {
+ ast = avformat_new_stream(s, NULL);
+ if (!ast)
+ return AVERROR(ENOMEM);
+ ctx->a_id = ast->index;
+
+ ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ ast->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
+ ast->codec->channels = 2;
+ ast->codec->channel_layout = AV_CH_LAYOUT_STEREO;
+ ast->codec->sample_rate = 44100;
+ ast->codec->bit_rate = 2 * 2 * 44100 * 8;
+ ast->codec->block_align = 2 * 2;
+ ast->codec->bits_per_coded_sample = 16;
+ avpriv_set_pts_info(ast, 32, 1, 1000);
+ } else
+ ctx->a_id = -1;
+
+ if ((ret = get_codec_data(pb, vst, ast, is_mythtv)) < 0)
+ return ret;
+
+ ctx->rtjpg_video = vst && vst->codec->codec_id == AV_CODEC_ID_NUV;
+
+ return 0;
+}
+
+#define HDRSIZE 12
+
+static int nuv_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ NUVContext *ctx = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint8_t hdr[HDRSIZE];
+ nuv_frametype frametype;
+ int ret, size;
+
+ while (!url_feof(pb)) {
+ int copyhdrsize = ctx->rtjpg_video ? HDRSIZE : 0;
+ uint64_t pos = avio_tell(pb);
+
+ ret = avio_read(pb, hdr, HDRSIZE);
+ if (ret < HDRSIZE)
+ return ret < 0 ? ret : AVERROR(EIO);
+
+ frametype = hdr[0];
+ size = PKTSIZE(AV_RL32(&hdr[8]));
+
+ switch (frametype) {
+ case NUV_EXTRADATA:
+ if (!ctx->rtjpg_video) {
+ avio_skip(pb, size);
+ break;
+ }
+ case NUV_VIDEO:
+ if (ctx->v_id < 0) {
+ av_log(s, AV_LOG_ERROR, "Video packet in file without video stream!\n");
+ avio_skip(pb, size);
+ break;
+ }
+ ret = av_new_packet(pkt, copyhdrsize + size);
+ if (ret < 0)
+ return ret;
+
+ pkt->pos = pos;
+ pkt->flags |= hdr[2] == 0 ? AV_PKT_FLAG_KEY : 0;
+ pkt->pts = AV_RL32(&hdr[4]);
+ pkt->stream_index = ctx->v_id;
+ memcpy(pkt->data, hdr, copyhdrsize);
+ ret = avio_read(pb, pkt->data + copyhdrsize, size);
+ if (ret < 0) {
+ av_free_packet(pkt);
+ return ret;
+ }
+ if (ret < size)
+ av_shrink_packet(pkt, copyhdrsize + ret);
+ return 0;
+ case NUV_AUDIO:
+ if (ctx->a_id < 0) {
+ av_log(s, AV_LOG_ERROR, "Audio packet in file without audio stream!\n");
+ avio_skip(pb, size);
+ break;
+ }
+ ret = av_get_packet(pb, pkt, size);
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ pkt->pos = pos;
+ pkt->pts = AV_RL32(&hdr[4]);
+ pkt->stream_index = ctx->a_id;
+ if (ret < 0)
+ return ret;
+ return 0;
+ case NUV_SEEKP:
+ // contains no data, size value is invalid
+ break;
+ default:
+ avio_skip(pb, size);
+ break;
+ }
+ }
+
+ return AVERROR(EIO);
+}
+
+/**
+ * \brief looks for the string RTjjjjjjjjjj in the stream too resync reading
+ * \return 1 if the syncword is found 0 otherwise.
+ */
+static int nuv_resync(AVFormatContext *s, int64_t pos_limit) {
+ AVIOContext *pb = s->pb;
+ uint32_t tag = 0;
+ while(!url_feof(pb) && avio_tell(pb) < pos_limit) {
+ tag = (tag << 8) | avio_r8(pb);
+ if (tag == MKBETAG('R','T','j','j') &&
+ (tag = avio_rb32(pb)) == MKBETAG('j','j','j','j') &&
+ (tag = avio_rb32(pb)) == MKBETAG('j','j','j','j'))
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * \brief attempts to read a timestamp from stream at the given stream position
+ * \return timestamp if successful and AV_NOPTS_VALUE if failure
+ */
+static int64_t nuv_read_dts(AVFormatContext *s, int stream_index,
+ int64_t *ppos, int64_t pos_limit)
+{
+ NUVContext *ctx = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint8_t hdr[HDRSIZE];
+ nuv_frametype frametype;
+ int size, key, idx;
+ int64_t pos, dts;
+
+ if (avio_seek(pb, *ppos, SEEK_SET) < 0)
+ return AV_NOPTS_VALUE;
+
+ if (!nuv_resync(s, pos_limit))
+ return AV_NOPTS_VALUE;
+
+ while (!url_feof(pb) && avio_tell(pb) < pos_limit) {
+ if (avio_read(pb, hdr, HDRSIZE) < HDRSIZE)
+ return AV_NOPTS_VALUE;
+ frametype = hdr[0];
+ size = PKTSIZE(AV_RL32(&hdr[8]));
+ switch (frametype) {
+ case NUV_SEEKP:
+ break;
+ case NUV_AUDIO:
+ case NUV_VIDEO:
+ if (frametype == NUV_VIDEO) {
+ idx = ctx->v_id;
+ key = hdr[2] == 0;
+ } else {
+ idx = ctx->a_id;
+ key = 1;
+ }
+ if (stream_index == idx) {
+
+ pos = avio_tell(s->pb) - HDRSIZE;
+ dts = AV_RL32(&hdr[4]);
+
+ // TODO - add general support in av_gen_search, so it adds positions after reading timestamps
+ av_add_index_entry(s->streams[stream_index], pos, dts, size + HDRSIZE, 0,
+ key ? AVINDEX_KEYFRAME : 0);
+
+ *ppos = pos;
+ return dts;
+ }
+ default:
+ avio_skip(pb, size);
+ break;
+ }
+ }
+ return AV_NOPTS_VALUE;
+}
+
+
+AVInputFormat ff_nuv_demuxer = {
+ .name = "nuv",
+ .long_name = NULL_IF_CONFIG_SMALL("NuppelVideo"),
+ .priv_data_size = sizeof(NUVContext),
+ .read_probe = nuv_probe,
+ .read_header = nuv_header,
+ .read_packet = nuv_packet,
+ .read_timestamp = nuv_read_dts,
+ .flags = AVFMT_GENERIC_INDEX,
+};
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