yuv4mpeg: cosmetics: pretty-printing

Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>

1 files changed, 133 insertions, 115 deletions

diff --git a/libavformat/yuv4mpeg.c b/libavformat/yuv4mpeg.c
index 66fcc1f2a1..698ee6814d 100644
--- a/libavformat/yuv4mpeg.c
+++ b/libavformat/yuv4mpeg.c
@@ -39,23 +39,24 @@ static int yuv4_generate_header(AVFormatContext *s, char* buf)
     char inter;
     const char *colorspace = "";
 
-    st = s->streams[0];
-    width = st->codec->width;
+    st     = s->streams[0];
+    width  = st->codec->width;
     height = st->codec->height;
 
-    av_reduce(&raten, &rated, st->codec->time_base.den, st->codec->time_base.num, (1UL<<31)-1);
+    av_reduce(&raten, &rated, st->codec->time_base.den,
+              st->codec->time_base.num, (1UL << 31) - 1);
 
     aspectn = st->sample_aspect_ratio.num;
     aspectd = st->sample_aspect_ratio.den;
 
-    if ( aspectn == 0 && aspectd == 1 ) aspectd = 0;  // 0:0 means unknown
+    if (aspectn == 0 && aspectd == 1)
+        aspectd = 0;  // 0:0 means unknown
 
     inter = 'p'; /* progressive is the default */
-    if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame) {
+    if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame)
         inter = st->codec->coded_frame->top_field_first ? 't' : 'b';
-    }
 
-    switch(st->codec->pix_fmt) {
+    switch (st->codec->pix_fmt) {
     case PIX_FMT_GRAY8:
         colorspace = " Cmono";
         break;
@@ -63,9 +64,11 @@ static int yuv4_generate_header(AVFormatContext *s, char* buf)
         colorspace = " C411 XYSCSS=411";
         break;
     case PIX_FMT_YUV420P:
-        colorspace = (st->codec->chroma_sample_location == AVCHROMA_LOC_TOPLEFT)?" C420paldv XYSCSS=420PALDV":
-                     (st->codec->chroma_sample_location == AVCHROMA_LOC_LEFT)   ?" C420mpeg2 XYSCSS=420MPEG2":
-                     " C420jpeg XYSCSS=420JPEG";
+        switch (st->codec->chroma_sample_location) {
+        case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break;
+        case AVCHROMA_LOC_LEFT:    colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break;
+        default:                   colorspace = " C420jpeg XYSCSS=420JPEG";   break;
+        }
         break;
     case PIX_FMT_YUV422P:
         colorspace = " C422 XYSCSS=422";
@@ -77,13 +80,8 @@ static int yuv4_generate_header(AVFormatContext *s, char* buf)
 
     /* construct stream header, if this is the first frame */
     n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
-                 Y4M_MAGIC,
-                 width,
-                 height,
-                 raten, rated,
-                 inter,
-                 aspectn, aspectd,
-                 colorspace);
+                 Y4M_MAGIC, width, height, raten, rated, inter,
+                 aspectn, aspectd, colorspace);
 
     return n;
 }
@@ -96,7 +94,7 @@ static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
     int* first_pkt = s->priv_data;
     int width, height, h_chroma_shift, v_chroma_shift;
     int i;
-    char buf2[Y4M_LINE_MAX+1];
+    char buf2[Y4M_LINE_MAX + 1];
     char buf1[20];
     uint8_t *ptr, *ptr1, *ptr2;
 
@@ -106,7 +104,8 @@ static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
     if (*first_pkt) {
         *first_pkt = 0;
         if (yuv4_generate_header(s, buf2) < 0) {
-            av_log(s, AV_LOG_ERROR, "Error. YUV4MPEG stream header write failed.\n");
+            av_log(s, AV_LOG_ERROR,
+                   "Error. YUV4MPEG stream header write failed.\n");
             return AVERROR(EIO);
         } else {
             avio_write(pb, buf2, strlen(buf2));
@@ -118,31 +117,32 @@ static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
     snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC);
     avio_write(pb, buf1, strlen(buf1));
 
-    width = st->codec->width;
+    width  = st->codec->width;
     height = st->codec->height;
 
     ptr = picture->data[0];
-    for(i=0;i<height;i++) {
+    for (i = 0; i < height; i++) {
         avio_write(pb, ptr, width);
         ptr += picture->linesize[0];
     }
 
-    if (st->codec->pix_fmt != PIX_FMT_GRAY8){
-    // Adjust for smaller Cb and Cr planes
-    avcodec_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift, &v_chroma_shift);
-    width >>= h_chroma_shift;
-    height >>= v_chroma_shift;
-
-    ptr1 = picture->data[1];
-    ptr2 = picture->data[2];
-    for(i=0;i<height;i++) {     /* Cb */
-        avio_write(pb, ptr1, width);
-        ptr1 += picture->linesize[1];
-    }
-    for(i=0;i<height;i++) {     /* Cr */
-        avio_write(pb, ptr2, width);
+    if (st->codec->pix_fmt != PIX_FMT_GRAY8) {
+        // Adjust for smaller Cb and Cr planes
+        avcodec_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift,
+                                      &v_chroma_shift);
+        width  >>= h_chroma_shift;
+        height >>= v_chroma_shift;
+
+        ptr1 = picture->data[1];
+        ptr2 = picture->data[2];
+        for (i = 0; i < height; i++) {     /* Cb */
+            avio_write(pb, ptr1, width);
+            ptr1 += picture->linesize[1];
+        }
+        for (i = 0; i < height; i++) {     /* Cr */
+            avio_write(pb, ptr2, width);
             ptr2 += picture->linesize[2];
-    }
+        }
     }
     avio_flush(pb);
     return 0;
@@ -150,19 +150,21 @@ static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
 
 static int yuv4_write_header(AVFormatContext *s)
 {
-    int* first_pkt = s->priv_data;
+    int *first_pkt = s->priv_data;
 
     if (s->nb_streams != 1)
         return AVERROR(EIO);
 
     if (s->streams[0]->codec->pix_fmt == PIX_FMT_YUV411P) {
-        av_log(s, AV_LOG_ERROR, "Warning: generating rarely used 4:1:1 YUV stream, some mjpegtools might not work.\n");
-    }
-    else if ((s->streams[0]->codec->pix_fmt != PIX_FMT_YUV420P) &&
-             (s->streams[0]->codec->pix_fmt != PIX_FMT_YUV422P) &&
-             (s->streams[0]->codec->pix_fmt != PIX_FMT_GRAY8) &&
-             (s->streams[0]->codec->pix_fmt != PIX_FMT_YUV444P)) {
-        av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg only handles yuv444p, yuv422p, yuv420p, yuv411p and gray pixel formats. Use -pix_fmt to select one.\n");
+        av_log(s, AV_LOG_ERROR, "Warning: generating rarely used 4:1:1 YUV "
+               "stream, some mjpegtools might not work.\n");
+    } else if ((s->streams[0]->codec->pix_fmt != PIX_FMT_YUV420P) &&
+               (s->streams[0]->codec->pix_fmt != PIX_FMT_YUV422P) &&
+               (s->streams[0]->codec->pix_fmt != PIX_FMT_GRAY8)   &&
+               (s->streams[0]->codec->pix_fmt != PIX_FMT_YUV444P)) {
+        av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg only handles yuv444p, "
+               "yuv422p, yuv420p, yuv411p and gray pixel formats. "
+               "Use -pix_fmt to select one.\n");
         return AVERROR(EIO);
     }
 
@@ -180,7 +182,7 @@ AVOutputFormat ff_yuv4mpegpipe_muxer = {
     .video_codec       = CODEC_ID_RAWVIDEO,
     .write_header      = yuv4_write_header,
     .write_packet      = yuv4_write_packet,
-    .flags = AVFMT_RAWPICTURE,
+    .flags             = AVFMT_RAWPICTURE,
 };
 #endif
 
@@ -190,85 +192,96 @@ AVOutputFormat ff_yuv4mpegpipe_muxer = {
 
 static int yuv4_read_header(AVFormatContext *s, AVFormatParameters *ap)
 {
-    char header[MAX_YUV4_HEADER+10];  // Include headroom for the longest option
-    char *tokstart,*tokend,*header_end;
+    char header[MAX_YUV4_HEADER + 10];  // Include headroom for
+                                        // the longest option
+    char *tokstart, *tokend, *header_end;
     int i;
     AVIOContext *pb = s->pb;
-    int width=-1, height=-1, raten=0, rated=0, aspectn=0, aspectd=0;
-    enum PixelFormat pix_fmt=PIX_FMT_NONE,alt_pix_fmt=PIX_FMT_NONE;
+    int width = -1, height  = -1, raten   = 0,
+        rated =  0, aspectn =  0, aspectd = 0;
+    enum PixelFormat pix_fmt = PIX_FMT_NONE, alt_pix_fmt = PIX_FMT_NONE;
     enum AVChromaLocation chroma_sample_location = AVCHROMA_LOC_UNSPECIFIED;
     AVStream *st;
     struct frame_attributes *s1 = s->priv_data;
 
-    for (i=0; i<MAX_YUV4_HEADER; i++) {
+    for (i = 0; i < MAX_YUV4_HEADER; i++) {
         header[i] = avio_r8(pb);
         if (header[i] == '\n') {
-            header[i+1] = 0x20;  // Add a space after last option. Makes parsing "444" vs "444alpha" easier.
-            header[i+2] = 0;
+            header[i + 1] = 0x20;  // Add a space after last option.
+                                   // Makes parsing "444" vs "444alpha" easier.
+            header[i + 2] = 0;
             break;
         }
     }
-    if (i == MAX_YUV4_HEADER) return -1;
-    if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC))) return -1;
+    if (i == MAX_YUV4_HEADER)
+        return -1;
+    if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC)))
+        return -1;
 
     s1->interlaced_frame = 0;
     s1->top_field_first = 0;
-    header_end = &header[i+1]; // Include space
-    for(tokstart = &header[strlen(Y4M_MAGIC) + 1]; tokstart < header_end; tokstart++) {
-        if (*tokstart==0x20) continue;
+    header_end = &header[i + 1]; // Include space
+    for (tokstart = &header[strlen(Y4M_MAGIC) + 1];
+         tokstart < header_end; tokstart++) {
+        if (*tokstart == 0x20)
+            continue;
         switch (*tokstart++) {
         case 'W': // Width. Required.
-            width = strtol(tokstart, &tokend, 10);
-            tokstart=tokend;
+            width    = strtol(tokstart, &tokend, 10);
+            tokstart = tokend;
             break;
         case 'H': // Height. Required.
-            height = strtol(tokstart, &tokend, 10);
-            tokstart=tokend;
+            height   = strtol(tokstart, &tokend, 10);
+            tokstart = tokend;
             break;
         case 'C': // Color space
-            if (strncmp("420jpeg",tokstart,7)==0) {
+            if (strncmp("420jpeg", tokstart, 7) == 0) {
                 pix_fmt = PIX_FMT_YUV420P;
                 chroma_sample_location = AVCHROMA_LOC_CENTER;
-            } else if (strncmp("420mpeg2",tokstart,8)==0) {
+            } else if (strncmp("420mpeg2", tokstart, 8) == 0) {
                 pix_fmt = PIX_FMT_YUV420P;
                 chroma_sample_location = AVCHROMA_LOC_LEFT;
-            } else if (strncmp("420paldv", tokstart, 8)==0) {
+            } else if (strncmp("420paldv", tokstart, 8) == 0) {
                 pix_fmt = PIX_FMT_YUV420P;
                 chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
-            } else if (strncmp("411", tokstart, 3)==0)
+            } else if (strncmp("411", tokstart, 3) == 0)
                 pix_fmt = PIX_FMT_YUV411P;
-            else if (strncmp("422", tokstart, 3)==0)
+            else if (strncmp("422", tokstart, 3) == 0)
                 pix_fmt = PIX_FMT_YUV422P;
-            else if (strncmp("444alpha", tokstart, 8)==0) {
-                av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 YUV4MPEG stream.\n");
+            else if (strncmp("444alpha", tokstart, 8) == 0 ) {
+                av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 "
+                       "YUV4MPEG stream.\n");
                 return -1;
-            } else if (strncmp("444", tokstart, 3)==0)
+            } else if (strncmp("444", tokstart, 3) == 0)
                 pix_fmt = PIX_FMT_YUV444P;
-            else if (strncmp("mono",tokstart, 4)==0) {
+            else if (strncmp("mono", tokstart, 4) == 0) {
                 pix_fmt = PIX_FMT_GRAY8;
             } else {
-                av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown pixel format.\n");
+                av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown "
+                       "pixel format.\n");
                 return -1;
             }
-            while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
+            while (tokstart < header_end && *tokstart != 0x20)
+                tokstart++;
             break;
         case 'I': // Interlace type
             switch (*tokstart++){
             case '?':
                 break;
             case 'p':
-                s1->interlaced_frame=0;
+                s1->interlaced_frame = 0;
                 break;
             case 't':
-                s1->interlaced_frame=1;
-                s1->top_field_first=1;
+                s1->interlaced_frame = 1;
+                s1->top_field_first = 1;
                 break;
             case 'b':
-                s1->interlaced_frame=1;
-                s1->top_field_first=0;
+                s1->interlaced_frame = 1;
+                s1->top_field_first = 0;
                 break;
             case 'm':
-                av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed interlaced and non-interlaced frames.\n");
+                av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed "
+                       "interlaced and non-interlaced frames.\n");
                 return -1;
             default:
                 av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
@@ -276,36 +289,39 @@ static int yuv4_read_header(AVFormatContext *s, AVFormatParameters *ap)
             }
             break;
         case 'F': // Frame rate
-            sscanf(tokstart,"%d:%d",&raten,&rated); // 0:0 if unknown
-            while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
+            sscanf(tokstart, "%d:%d", &raten, &rated); // 0:0 if unknown
+            while (tokstart < header_end && *tokstart != 0x20)
+                tokstart++;
             break;
         case 'A': // Pixel aspect
-            sscanf(tokstart,"%d:%d",&aspectn,&aspectd); // 0:0 if unknown
-            while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
+            sscanf(tokstart, "%d:%d", &aspectn, &aspectd); // 0:0 if unknown
+            while (tokstart < header_end && *tokstart != 0x20)
+                tokstart++;
             break;
         case 'X': // Vendor extensions
-            if (strncmp("YSCSS=",tokstart,6)==0) {
+            if (strncmp("YSCSS=", tokstart, 6) == 0) {
                 // Older nonstandard pixel format representation
-                tokstart+=6;
-                if (strncmp("420JPEG",tokstart,7)==0)
-                    alt_pix_fmt=PIX_FMT_YUV420P;
-                else if (strncmp("420MPEG2",tokstart,8)==0)
-                    alt_pix_fmt=PIX_FMT_YUV420P;
-                else if (strncmp("420PALDV",tokstart,8)==0)
-                    alt_pix_fmt=PIX_FMT_YUV420P;
-                else if (strncmp("411",tokstart,3)==0)
-                    alt_pix_fmt=PIX_FMT_YUV411P;
-                else if (strncmp("422",tokstart,3)==0)
-                    alt_pix_fmt=PIX_FMT_YUV422P;
-                else if (strncmp("444",tokstart,3)==0)
-                    alt_pix_fmt=PIX_FMT_YUV444P;
+                tokstart += 6;
+                if (strncmp("420JPEG", tokstart, 7) == 0)
+                    alt_pix_fmt = PIX_FMT_YUV420P;
+                else if (strncmp("420MPEG2", tokstart, 8) == 0)
+                    alt_pix_fmt = PIX_FMT_YUV420P;
+                else if (strncmp("420PALDV", tokstart, 8) == 0)
+                    alt_pix_fmt = PIX_FMT_YUV420P;
+                else if (strncmp("411", tokstart, 3) == 0)
+                    alt_pix_fmt = PIX_FMT_YUV411P;
+                else if (strncmp("422", tokstart, 3) == 0)
+                    alt_pix_fmt = PIX_FMT_YUV422P;
+                else if (strncmp("444", tokstart, 3) == 0)
+                    alt_pix_fmt = PIX_FMT_YUV444P;
             }
-            while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
+            while (tokstart < header_end && *tokstart != 0x20)
+                tokstart++;
             break;
         }
     }
 
-    if ((width == -1) || (height == -1)) {
+    if (width == -1 || height == -1) {
         av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
         return -1;
     }
@@ -329,16 +345,16 @@ static int yuv4_read_header(AVFormatContext *s, AVFormatParameters *ap)
     }
 
     st = avformat_new_stream(s, NULL);
-    if(!st)
+    if (!st)
         return AVERROR(ENOMEM);
-    st->codec->width = width;
+    st->codec->width  = width;
     st->codec->height = height;
-    av_reduce(&raten, &rated, raten, rated, (1UL<<31)-1);
+    av_reduce(&raten, &rated, raten, rated, (1UL << 31) - 1);
     avpriv_set_pts_info(st, 64, rated, raten);
-    st->codec->pix_fmt = pix_fmt;
-    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
-    st->codec->codec_id = CODEC_ID_RAWVIDEO;
-    st->sample_aspect_ratio= (AVRational){aspectn, aspectd};
+    st->codec->pix_fmt                = pix_fmt;
+    st->codec->codec_type             = AVMEDIA_TYPE_VIDEO;
+    st->codec->codec_id               = CODEC_ID_RAWVIDEO;
+    st->sample_aspect_ratio           = (AVRational){ aspectn, aspectd };
     st->codec->chroma_sample_location = chroma_sample_location;
 
     return 0;
@@ -352,17 +368,19 @@ static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
     AVStream *st = s->streams[0];
     struct frame_attributes *s1 = s->priv_data;
 
-    for (i=0; i<MAX_FRAME_HEADER; i++) {
+    for (i = 0; i < MAX_FRAME_HEADER; i++) {
         header[i] = avio_r8(s->pb);
         if (header[i] == '\n') {
-            header[i+1] = 0;
+            header[i + 1] = 0;
             break;
         }
     }
-    if (i == MAX_FRAME_HEADER) return -1;
-    if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC))) return -1;
+    if (i == MAX_FRAME_HEADER)
+        return -1;
+    if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC)))
+        return -1;
 
-    width = st->codec->width;
+    width  = st->codec->width;
     height = st->codec->height;
 
     packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
@@ -372,9 +390,9 @@ static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
     if (av_get_packet(s->pb, pkt, packet_size) != packet_size)
         return AVERROR(EIO);
 
-    if (s->streams[0]->codec->coded_frame) {
-        s->streams[0]->codec->coded_frame->interlaced_frame = s1->interlaced_frame;
-        s->streams[0]->codec->coded_frame->top_field_first = s1->top_field_first;
+    if (st->codec->coded_frame) {
+        st->codec->coded_frame->interlaced_frame = s1->interlaced_frame;
+        st->codec->coded_frame->top_field_first  = s1->top_field_first;
     }
 
     pkt->stream_index = 0;
@@ -384,7 +402,7 @@ static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
 static int yuv4_probe(AVProbeData *pd)
 {
     /* check file header */
-    if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC)-1)==0)
+    if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0)
         return AVPROBE_SCORE_MAX;
     else
         return 0;
@@ -398,6 +416,6 @@ AVInputFormat ff_yuv4mpegpipe_demuxer = {
     .read_probe     = yuv4_probe,
     .read_header    = yuv4_read_header,
     .read_packet    = yuv4_read_packet,
-    .extensions = "y4m"
+    .extensions     = "y4m"
 };
 #endif