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- Writes correct unknown aspect
- Adds read and write support for yuv422p and yuv444p - New parser will read all well-formed YUV4MPEG2 stream headers patch by (Roine Gustafsson <roine users.sourceforge net>) Originally committed as revision 3800 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Roine Gustafsson
Michael Niedermayer
parent
a4dae92b58
commit
2d74541476
@ -30,6 +30,7 @@ static int yuv4_generate_header(AVFormatContext *s, char* buf)
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int width, height;
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int raten, rated, aspectn, aspectd, n;
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char inter;
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char *colorspace = "";
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st = s->streams[0];
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width = st->codec.width;
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@ -40,11 +41,28 @@ static int yuv4_generate_header(AVFormatContext *s, char* buf)
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aspectn = st->codec.sample_aspect_ratio.num;
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aspectd = st->codec.sample_aspect_ratio.den;
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if ( aspectn == 0 && aspectd == 1 ) aspectd = 0; // 0:0 means unknown
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inter = 'p'; /* progressive is the default */
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if (st->codec.coded_frame && st->codec.coded_frame->interlaced_frame) {
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inter = st->codec.coded_frame->top_field_first ? 't' : 'b';
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}
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switch(st->codec.pix_fmt) {
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case PIX_FMT_YUV411P:
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colorspace = " C411 XYSCSS=411";
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break;
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case PIX_FMT_YUV420P:
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colorspace = (st->codec.codec_id == CODEC_ID_DVVIDEO)?" C420paldv XYSCSS=420PALDV":" C420mpeg2 XYSCSS=420MPEG2";
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break;
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case PIX_FMT_YUV422P:
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colorspace = " C422 XYSCSS=422";
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break;
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case PIX_FMT_YUV444P:
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colorspace = " C444 XYSCSS=444";
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break;
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}
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/* construct stream header, if this is the first frame */
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n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
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Y4M_MAGIC,
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@ -53,7 +71,7 @@ static int yuv4_generate_header(AVFormatContext *s, char* buf)
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raten, rated,
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inter,
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aspectn, aspectd,
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(st->codec.pix_fmt == PIX_FMT_YUV411P) ? " C411 XYSCSS=411" : " C420mpeg2 XYSCSS=420MPEG2");
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colorspace);
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return n;
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}
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@ -64,7 +82,7 @@ static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
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ByteIOContext *pb = &s->pb;
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AVPicture *picture;
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int* first_pkt = s->priv_data;
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int width, height;
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int width, height, h_chroma_shift, v_chroma_shift;
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int i, m;
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char buf2[Y4M_LINE_MAX+1];
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char buf1[20];
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@ -97,8 +115,11 @@ static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
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ptr += picture->linesize[0];
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}
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height >>= 1;
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width >>= 1;
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// Adjust for smaller Cb and Cr planes
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avcodec_get_chroma_sub_sample(st->codec.pix_fmt, &h_chroma_shift, &v_chroma_shift);
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width >>= h_chroma_shift;
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height >>= v_chroma_shift;
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ptr1 = picture->data[1];
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ptr2 = picture->data[2];
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for(i=0;i<height;i++) { /* Cb */
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@ -121,10 +142,12 @@ static int yuv4_write_header(AVFormatContext *s)
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return AVERROR_IO;
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if (s->streams[0]->codec.pix_fmt == PIX_FMT_YUV411P) {
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av_log(s, AV_LOG_ERROR, "Warning: generating non-standard 4:1:1 YUV stream, some mjpegtools might not work.\n");
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av_log(s, AV_LOG_ERROR, "Warning: generating rarely used 4:1:1 YUV stream, some mjpegtools might not work.\n");
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}
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else if (s->streams[0]->codec.pix_fmt != PIX_FMT_YUV420P) {
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av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg only handles 4:2:0, 4:1:1 YUV data. Use -pix_fmt to select one.\n");
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else if ((s->streams[0]->codec.pix_fmt != PIX_FMT_YUV420P) &&
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(s->streams[0]->codec.pix_fmt != PIX_FMT_YUV422P) &&
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(s->streams[0]->codec.pix_fmt != PIX_FMT_YUV444P)) {
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av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg only handles 4:4:4, 4:2:2, 4:2:0 and 4:1:1 planar YUV data. Use -pix_fmt to select one.\n");
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return AVERROR_IO;
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}
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@ -154,29 +177,142 @@ AVOutputFormat yuv4mpegpipe_oformat = {
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/* Header size increased to allow room for optional flags */
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#define MAX_YUV4_HEADER 80
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#define MAX_FRAME_HEADER 10
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#define MAX_FRAME_HEADER 80
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static int yuv4_read_header(AVFormatContext *s, AVFormatParameters *ap)
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{
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char header[MAX_YUV4_HEADER+1];
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char header[MAX_YUV4_HEADER+10]; // Include headroom for the longest option
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char *tokstart,*tokend,*header_end;
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int i;
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ByteIOContext *pb = &s->pb;
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int width, height, raten, rated, aspectn, aspectd;
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char lacing;
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int width=-1, height=-1, raten=0, rated=0, aspectn=0, aspectd=0,interlaced_frame=0,top_field_first=0;
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enum PixelFormat pix_fmt=PIX_FMT_NB,alt_pix_fmt=PIX_FMT_NB;
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AVStream *st;
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for (i=0; i<MAX_YUV4_HEADER; i++) {
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header[i] = get_byte(pb);
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if (header[i] == '\n') {
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header[i+1] = 0;
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header[i+1] = 0x20; // Add a space after last option. Makes parsing "444" vs "444alpha" easier.
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header[i+2] = 0;
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break;
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}
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}
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if (i == MAX_YUV4_HEADER) return -1;
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if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC))) return -1;
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sscanf(header+strlen(Y4M_MAGIC), " W%d H%d F%d:%d I%c A%d:%d",
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&width, &height, &raten, &rated, &lacing, &aspectn, &aspectd);
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header_end = &header[i+1]; // Include space
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for(tokstart = &header[strlen(Y4M_MAGIC) + 1]; tokstart < header_end; tokstart++) {
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if (*tokstart==0x20) continue;
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switch (*tokstart++) {
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case 'W': // Width. Required.
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width = strtol(tokstart, &tokend, 10);
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tokstart=tokend;
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break;
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case 'H': // Height. Required.
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height = strtol(tokstart, &tokend, 10);
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tokstart=tokend;
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break;
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case 'C': // Color space
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if (strncmp("420jpeg",tokstart,7)==0)
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pix_fmt = PIX_FMT_YUV420P;
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else if (strncmp("420mpeg2",tokstart,8)==0)
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pix_fmt = PIX_FMT_YUV420P;
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else if (strncmp("420paldv", tokstart, 8)==0)
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pix_fmt = PIX_FMT_YUV420P;
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else if (strncmp("411", tokstart, 3)==0)
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pix_fmt = PIX_FMT_YUV411P;
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else if (strncmp("422", tokstart, 3)==0)
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pix_fmt = PIX_FMT_YUV422P;
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else if (strncmp("444alpha", tokstart, 8)==0) {
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av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 YUV4MPEG stream.\n");
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return -1;
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} else if (strncmp("444", tokstart, 3)==0)
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pix_fmt = PIX_FMT_YUV444P;
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else if (strncmp("mono",tokstart, 4)==0) {
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av_log(s, AV_LOG_ERROR, "Cannot handle luma only YUV4MPEG stream.\n");
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return -1;
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} else {
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av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown pixel format.\n");
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return -1;
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}
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while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
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break;
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case 'I': // Interlace type
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switch (*tokstart++){
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case '?':
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break;
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case 'p':
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interlaced_frame=0;
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break;
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case 't':
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interlaced_frame=1;
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top_field_first=1;
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break;
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case 'b':
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interlaced_frame=1;
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top_field_first=0;
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break;
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case 'm':
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av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed interlaced and non-interlaced frames.\n");
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return -1;
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default:
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av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
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return -1;
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}
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break;
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case 'F': // Frame rate
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sscanf(tokstart,"%d:%d",&raten,&rated); // 0:0 if unknown
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while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
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break;
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case 'A': // Pixel aspect
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sscanf(tokstart,"%d:%d",&aspectn,&aspectd); // 0:0 if unknown
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while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
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break;
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case 'X': // Vendor extensions
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if (strncmp("YSCSS=",tokstart,6)==0) {
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// Older nonstandard pixel format representation
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tokstart+=6;
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if (strncmp("420JPEG",tokstart,7)==0)
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alt_pix_fmt=PIX_FMT_YUV420P;
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else if (strncmp("420MPEG2",tokstart,8)==0)
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alt_pix_fmt=PIX_FMT_YUV420P;
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else if (strncmp("420PALDV",tokstart,8)==0)
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alt_pix_fmt=PIX_FMT_YUV420P;
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else if (strncmp("411",tokstart,3)==0)
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alt_pix_fmt=PIX_FMT_YUV411P;
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else if (strncmp("422",tokstart,3)==0)
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alt_pix_fmt=PIX_FMT_YUV422P;
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else if (strncmp("444",tokstart,3)==0)
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alt_pix_fmt=PIX_FMT_YUV444P;
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}
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while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
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break;
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}
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}
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if ((width == -1) || (height == -1)) {
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av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
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return -1;
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}
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if (pix_fmt == PIX_FMT_NB) {
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if (alt_pix_fmt == PIX_FMT_NB)
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pix_fmt = PIX_FMT_YUV420P;
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else
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pix_fmt = alt_pix_fmt;
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}
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if (raten == 0 && rated == 0) {
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// Frame rate unknown
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raten = 25;
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rated = 1;
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}
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if (aspectn == 0 && aspectd == 0) {
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// Pixel aspect unknown
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aspectd = 1;
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}
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st = av_new_stream(s, 0);
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st = s->streams[0];
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st->codec.width = width;
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@ -184,7 +320,7 @@ static int yuv4_read_header(AVFormatContext *s, AVFormatParameters *ap)
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av_reduce(&raten, &rated, raten, rated, (1UL<<31)-1);
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st->codec.frame_rate = raten;
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st->codec.frame_rate_base = rated;
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st->codec.pix_fmt = PIX_FMT_YUV420P;
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st->codec.pix_fmt = pix_fmt;
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st->codec.codec_type = CODEC_TYPE_VIDEO;
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st->codec.codec_id = CODEC_ID_RAWVIDEO;
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st->codec.sample_aspect_ratio= (AVRational){aspectn, aspectd};
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@ -39,7 +39,7 @@ fea20ced22451312dd463110e594eda6 *./data/b-libav.nut
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./data/b-libav.ppm CRC=b2bb8e92
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88a98269295fbfce7816558ad84e1259 *./data/b-libav.gif
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2906382 ./data/b-libav.gif
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c39dd19b88f9e0f03a318b51c37edb61 *./data/b-libav.yuv4mpeg
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b977a4fedff90a79baf70c8e02986820 *./data/b-libav.yuv4mpeg
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3801810 ./data/b-libav.yuv4mpeg
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./data/b-libav%d.pgm CRC=84c09106
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./data/b-libav%d.ppm CRC=25c06ecf
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