riff: Move functions around to be covered by appropriate #ifdefs

[ffmpeg] / libavformat / rtpdec_jpeg.c

diff --git a/libavformat/rtpdec_jpeg.c b/libavformat/rtpdec_jpeg.c
index b1361cd1647437c072e31fc5ab891e92a00217f9..944758d4fc5b2324e02badedc26c78d86a71e129 100644 (file)
--- a/libavformat/rtpdec_jpeg.c
+++ b/libavformat/rtpdec_jpeg.c
@@ -32,6 +32,8 @@ struct PayloadContext {
     AVIOContext *frame;         ///< current frame buffer
     uint32_t    timestamp;      ///< current frame timestamp
     int         hdr_size;       ///< size of the current frame header
+    uint8_t     qtables[128][128];
+    uint8_t     qtables_len[128];
 };
 
 static const uint8_t default_quantizers[128] = {
@@ -244,6 +246,10 @@ static int jpeg_parse_packet(AVFormatContext *ctx, PayloadContext *jpeg,
                "Unimplemented RTP/JPEG restart marker header.\n");
         return AVERROR_PATCHWELCOME;
     }
+    if (type > 1) {
+        av_log(ctx, AV_LOG_ERROR, "Unimplemented RTP/JPEG type %d\n", type);
+        return AVERROR_PATCHWELCOME;
+    }
 
     /* Parse the quantization table header. */
     if (off == 0) {
@@ -267,12 +273,6 @@ static int jpeg_parse_packet(AVFormatContext *ctx, PayloadContext *jpeg,
             if (precision)
                 av_log(ctx, AV_LOG_WARNING, "Only 8-bit precision is supported.\n");
 
-            if (q == 255 && qtable_len == 0) {
-                av_log(ctx, AV_LOG_ERROR,
-                       "Invalid RTP/JPEG packet. Quantization tables not found.\n");
-                return AVERROR_INVALIDDATA;
-            }
-
             if (qtable_len > 0) {
                 if (len < qtable_len) {
                     av_log(ctx, AV_LOG_ERROR, "Too short RTP/JPEG packet.\n");
@@ -281,7 +281,40 @@ static int jpeg_parse_packet(AVFormatContext *ctx, PayloadContext *jpeg,
                 qtables = buf;
                 buf += qtable_len;
                 len -= qtable_len;
+                if (q < 255) {
+                    if (jpeg->qtables_len[q - 128] &&
+                        (jpeg->qtables_len[q - 128] != qtable_len ||
+                         memcmp(qtables, &jpeg->qtables[q - 128][0], qtable_len))) {
+                        av_log(ctx, AV_LOG_WARNING,
+                               "Quantization tables for q=%d changed\n", q);
+                    } else if (!jpeg->qtables_len[q - 128] && qtable_len <= 128) {
+                        memcpy(&jpeg->qtables[q - 128][0], qtables,
+                               qtable_len);
+                        jpeg->qtables_len[q - 128] = qtable_len;
+                    }
+                }
+            } else {
+                if (q == 255) {
+                    av_log(ctx, AV_LOG_ERROR,
+                           "Invalid RTP/JPEG packet. Quantization tables not found.\n");
+                    return AVERROR_INVALIDDATA;
+                }
+                if (!jpeg->qtables_len[q - 128]) {
+                    av_log(ctx, AV_LOG_ERROR,
+                           "No quantization tables known for q=%d yet.\n", q);
+                    return AVERROR_INVALIDDATA;
+                }
+                qtables    = &jpeg->qtables[q - 128][0];
+                qtable_len =  jpeg->qtables_len[q - 128];
             }
+        } else { /* q <= 127 */
+            if (q == 0 || q > 99) {
+                av_log(ctx, AV_LOG_ERROR, "Reserved q value %d\n", q);
+                return AVERROR_INVALIDDATA;
+            }
+            create_default_qtables(new_qtables, q);
+            qtables    = new_qtables;
+            qtable_len = sizeof(new_qtables);
         }
 
         /* Skip the current frame in case of the end packet
@@ -292,18 +325,12 @@ static int jpeg_parse_packet(AVFormatContext *ctx, PayloadContext *jpeg,
             return ret;
         jpeg->timestamp = *timestamp;
 
-        if (!qtables) {
-            create_default_qtables(new_qtables, q);
-            qtables    = new_qtables;
-            qtable_len = sizeof(new_qtables);
-        }
-
         /* Generate a frame and scan headers that can be prepended to the
          * RTP/JPEG data payload to produce a JPEG compressed image in
          * interchange format. */
         jpeg->hdr_size = jpeg_create_header(hdr, sizeof(hdr), type, width,
                                             height, qtables,
-                                            qtable_len > 64 ? 2 : 1);
+                                            qtable_len / 64);
 
         /* Copy JPEG header to frame buffer. */
         avio_write(jpeg->frame, hdr, jpeg->hdr_size);