avio: move ff_rewind_with_probe_data from avio.h to avio_internal.h
[ffmpeg.git] / libavcodec / h264_mp4toannexb_bsf.c
index 63653e4..e7f2e7a 100644 (file)
@@ -29,8 +29,8 @@ typedef struct H264BSFContext {
 } H264BSFContext;
 
 static int alloc_and_copy(uint8_t **poutbuf,          int *poutbuf_size,
-                           const uint8_t *sps_pps, uint32_t sps_pps_size,
-                           const uint8_t *in,      uint32_t in_size) {
+                          const uint8_t *sps_pps, uint32_t sps_pps_size,
+                          const uint8_t *in,      uint32_t in_size) {
     uint32_t offset = *poutbuf_size;
     uint8_t nal_header_size = offset ? 3 : 4;
     void *tmp;
@@ -43,9 +43,9 @@ static int alloc_and_copy(uint8_t **poutbuf,          int *poutbuf_size,
     if (sps_pps)
         memcpy(*poutbuf+offset, sps_pps, sps_pps_size);
     memcpy(*poutbuf+sps_pps_size+nal_header_size+offset, in, in_size);
-    if (!offset)
+    if (!offset) {
         AV_WB32(*poutbuf+sps_pps_size, 1);
-    else {
+    else {
         (*poutbuf+offset+sps_pps_size)[0] = (*poutbuf+offset+sps_pps_size)[1] = 0;
         (*poutbuf+offset+sps_pps_size)[2] = 1;
     }
@@ -75,7 +75,7 @@ static int h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc,
     if (!ctx->extradata_parsed) {
         uint16_t unit_size;
         uint64_t total_size = 0;
-        uint8_t *out = NULL, unit_nb, sps_done = 0;
+        uint8_t *out = NULL, unit_nb, sps_done = 0, sps_seen = 0, pps_seen = 0;
         const uint8_t *extradata = avctx->extradata+4;
         static const uint8_t nalu_header[4] = {0, 0, 0, 1};
 
@@ -89,13 +89,22 @@ static int h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc,
         if (!unit_nb) {
             unit_nb = *extradata++; /* number of pps unit(s) */
             sps_done++;
+
+            if (unit_nb)
+                pps_seen = 1;
+        }
+        else
+        {
+            sps_seen = 1;
         }
+
         while (unit_nb--) {
             void *tmp;
 
             unit_size = AV_RB16(extradata);
             total_size += unit_size+4;
-            if (total_size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE || extradata+2+unit_size > avctx->extradata+avctx->extradata_size) {
+            if (total_size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE ||
+                extradata+2+unit_size > avctx->extradata+avctx->extradata_size) {
                 av_free(out);
                 return AVERROR(EINVAL);
             }
@@ -113,7 +122,14 @@ static int h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc,
                 unit_nb = *extradata++; /* number of pps unit(s) */
         }
 
-        memset(out + total_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+        if(out)
+            memset(out + total_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+        if (!sps_seen)
+            av_log(avctx, AV_LOG_WARNING, "Warning: SPS NALU missing or invalid. The resulting stream may not play.\n");
+        if (!pps_seen)
+            av_log(avctx, AV_LOG_WARNING, "Warning: PPS NALU missing or invalid. The resulting stream may not play.\n");
+
         av_free(avctx->extradata);
         avctx->extradata      = out;
         avctx->extradata_size = total_size;
@@ -127,11 +143,11 @@ static int h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc,
         if (buf + ctx->length_size > buf_end)
             goto fail;
 
-        if (ctx->length_size == 1)
+        if (ctx->length_size == 1) {
             nal_size = buf[0];
-        else if (ctx->length_size == 2)
+        } else if (ctx->length_size == 2) {
             nal_size = AV_RB16(buf);
-        else
+        else
             nal_size = AV_RB32(buf);
 
         buf += ctx->length_size;
@@ -143,14 +159,13 @@ static int h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc,
         /* prepend only to the first type 5 NAL unit of an IDR picture */
         if (ctx->first_idr && unit_type == 5) {
             if (alloc_and_copy(poutbuf, poutbuf_size,
-                           avctx->extradata, avctx->extradata_size,
+                               avctx->extradata, avctx->extradata_size,
                                buf, nal_size) < 0)
                 goto fail;
             ctx->first_idr = 0;
-        }
-        else {
+        } else {
             if (alloc_and_copy(poutbuf, poutbuf_size,
-                           NULL, 0,
+                               NULL, 0,
                                buf, nal_size) < 0)
                 goto fail;
             if (!ctx->first_idr && unit_type == 1)
@@ -169,7 +184,7 @@ fail:
     return AVERROR(EINVAL);
 }
 
-AVBitStreamFilter h264_mp4toannexb_bsf = {
+AVBitStreamFilter ff_h264_mp4toannexb_bsf = {
     "h264_mp4toannexb",
     sizeof(H264BSFContext),
     h264_mp4toannexb_filter,