Merge remote-tracking branch 'qatar/master'

* qatar/master:
  fate: split ADPCM and DPCM test references into separate files.
  mov, mxfdec: Employ more meaningful return values.
  lavc: Relax API strictness in avcodec_decode_audio3 with a custom get_buffer()
  wavpack: fix clipping for 32-bit lossy mode
  vb: Use bytestream2 functions

Conflicts:
	libavcodec/utils.c
	libavcodec/vb.c
	libavformat/mxfdec.c
	tests/fate/dpcm.mak

Merged-by: Michael Niedermayer <michaelni@gmx.at>

4 files changed, 56 insertions, 59 deletions

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 9a8ca81db9..4e55e0e12b 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -4188,6 +4188,11 @@ int avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options)
  * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
  * no overreading happens for damaged MPEG streams.
  *
+ * @warning You must not provide a custom get_buffer() when using
+ * avcodec_decode_audio3().  Doing so will override it with
+ * avcodec_default_get_buffer.  Use avcodec_decode_audio4() instead,
+ * which does allow the application to provide a custom get_buffer().
+ *
  * @note You might have to align the input buffer avpkt->data and output buffer
  * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
  * necessary at all, on others it won't work at all if not aligned and on others
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index e25f1dfb41..462288446b 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1057,8 +1057,10 @@ int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *sa
     int ret, got_frame = 0;
 
     if (avctx->get_buffer != avcodec_default_get_buffer) {
-        av_log(avctx, AV_LOG_ERROR, "Overriding custom get_buffer() for "
-               "avcodec_decode_audio3()\n");
+        av_log(avctx, AV_LOG_ERROR, "Custom get_buffer() for use with"
+               "avcodec_decode_audio3() detected. Overriding with avcodec_default_get_buffer\n");
+        av_log(avctx, AV_LOG_ERROR, "Please port your application to "
+               "avcodec_decode_audio4()\n");
         avctx->get_buffer = avcodec_default_get_buffer;
         avctx->release_buffer = avcodec_default_release_buffer;
     }
diff --git a/libavcodec/vb.c b/libavcodec/vb.c
index 26967db7b2..50e5d0b1a4 100644
--- a/libavcodec/vb.c
+++ b/libavcodec/vb.c
@@ -44,7 +44,7 @@ typedef struct VBDecContext {
 
     uint8_t *frame, *prev_frame;
     uint32_t pal[AVPALETTE_COUNT];
-    const uint8_t *stream;
+    GetByteContext stream;
 } VBDecContext;
 
 static const uint16_t vb_patterns[64] = {
@@ -62,8 +62,8 @@ static void vb_decode_palette(VBDecContext *c, int data_size)
 {
     int start, size, i;
 
-    start = bytestream_get_byte(&c->stream);
-    size = (bytestream_get_byte(&c->stream) - 1) & 0xFF;
+    start = bytestream2_get_byte(&c->stream);
+    size = (bytestream2_get_byte(&c->stream) - 1) & 0xFF;
     if(start + size > 255){
         av_log(c->avctx, AV_LOG_ERROR, "Palette change runs beyond entry 256\n");
         return;
@@ -73,7 +73,7 @@ static void vb_decode_palette(VBDecContext *c, int data_size)
         return;
     }
     for(i = start; i <= start + size; i++)
-        c->pal[i] = 0xFF << 24 | bytestream_get_be24(&c->stream);
+        c->pal[i] = 0xFFU << 24 | bytestream2_get_be24(&c->stream);
 }
 
 static inline int check_pixel(uint8_t *buf, uint8_t *start, uint8_t *end)
@@ -86,10 +86,10 @@ static inline int check_line(uint8_t *buf, uint8_t *start, uint8_t *end)
     return buf >= start && (buf + 4) <= end;
 }
 
-static int vb_decode_framedata(VBDecContext *c, const uint8_t *buf, int data_size, int offset)
+static int vb_decode_framedata(VBDecContext *c, int offset)
 {
+    GetByteContext g;
     uint8_t *prev, *cur;
-    const uint8_t* data_end = buf + data_size;
     int blk, blocks, t, blk2;
     int blocktypes = 0;
     int x, y, a, b;
@@ -98,6 +98,8 @@ static int vb_decode_framedata(VBDecContext *c, const uint8_t *buf, int data_siz
     uint8_t *pstart = c->prev_frame;
     uint8_t *pend = c->prev_frame + width*c->avctx->height;
 
+    g = c->stream;
+
     prev = c->prev_frame + offset;
     cur = c->frame;
 
@@ -105,11 +107,7 @@ static int vb_decode_framedata(VBDecContext *c, const uint8_t *buf, int data_siz
     blk2 = 0;
     for(blk = 0; blk < blocks; blk++){
         if(!(blk & 3)) {
-            if(buf >= data_end){
-                av_log(c->avctx, AV_LOG_ERROR, "Data pointer out of bounds\n");
-                return -1;
-            }
-            blocktypes = bytestream_get_byte(&buf);
+            blocktypes = bytestream2_get_byte(&g);
         }
         switch(blocktypes & 0xC0){
         case 0x00: //skip
@@ -120,15 +118,14 @@ static int vb_decode_framedata(VBDecContext *c, const uint8_t *buf, int data_siz
                     memset(cur + y*width, 0, 4);
             break;
         case 0x40:
-            t = bytestream_get_byte(&buf);
+            t = bytestream2_get_byte(&g);
             if(!t){ //raw block
-                if(buf + 16 > data_end){
+                if (bytestream2_get_bytes_left(&g) < 16) {
                     av_log(c->avctx, AV_LOG_ERROR, "Insufficient data\n");
                     return -1;
                 }
                 for(y = 0; y < 4; y++)
-                    memcpy(cur + y*width, buf + y*4, 4);
-                buf += 16;
+                    bytestream2_get_buffer(&g, cur + y * width, 4);
             }else{ // motion compensation
                 x = ((t & 0xF)^8) - 8;
                 y = ((t >> 4) ^8) - 8;
@@ -141,22 +138,18 @@ static int vb_decode_framedata(VBDecContext *c, const uint8_t *buf, int data_siz
             }
             break;
         case 0x80: // fill
-            t = bytestream_get_byte(&buf);
+            t = bytestream2_get_byte(&g);
             for(y = 0; y < 4; y++)
                 memset(cur + y*width, t, 4);
             break;
         case 0xC0: // pattern fill
-            if(buf + 2 > data_end){
-                av_log(c->avctx, AV_LOG_ERROR, "Insufficient data\n");
-                return -1;
-            }
-            t = bytestream_get_byte(&buf);
+            t = bytestream2_get_byte(&g);
             pattype = t >> 6;
             pattern = vb_patterns[t & 0x3F];
             switch(pattype){
             case 0:
-                a = bytestream_get_byte(&buf);
-                b = bytestream_get_byte(&buf);
+                a = bytestream2_get_byte(&g);
+                b = bytestream2_get_byte(&g);
                 for(y = 0; y < 4; y++)
                     for(x = 0; x < 4; x++, pattern >>= 1)
                         cur[x + y*width] = (pattern & 1) ? b : a;
@@ -164,7 +157,7 @@ static int vb_decode_framedata(VBDecContext *c, const uint8_t *buf, int data_siz
             case 1:
                 pattern = ~pattern;
             case 2:
-                a = bytestream_get_byte(&buf);
+                a = bytestream2_get_byte(&g);
                 for(y = 0; y < 4; y++)
                     for(x = 0; x < 4; x++, pattern >>= 1)
                         if(pattern & 1 && check_pixel(prev + x + y*width, pstart, pend))
@@ -193,16 +186,15 @@ static int vb_decode_framedata(VBDecContext *c, const uint8_t *buf, int data_siz
 
 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
 {
-    const uint8_t *buf = avpkt->data;
-    int buf_size = avpkt->size;
     VBDecContext * const c = avctx->priv_data;
     uint8_t *outptr, *srcptr;
     int i, j;
     int flags;
     uint32_t size;
-    int rest = buf_size;
     int offset = 0;
 
+    bytestream2_init(&c->stream, avpkt->data, avpkt->size);
+
     if(c->pic.data[0])
         avctx->release_buffer(avctx, &c->pic);
     c->pic.reference = 3;
@@ -211,38 +203,25 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
         return -1;
     }
 
-    c->stream = buf;
-    flags = bytestream_get_le16(&c->stream);
-    rest -= 2;
+    flags = bytestream2_get_le16(&c->stream);
 
     if(flags & VB_HAS_GMC){
-        i = (int16_t)bytestream_get_le16(&c->stream);
-        j = (int16_t)bytestream_get_le16(&c->stream);
+        i = (int16_t)bytestream2_get_le16(&c->stream);
+        j = (int16_t)bytestream2_get_le16(&c->stream);
         offset = i + j * avctx->width;
-        rest -= 4;
-    }
-    if(rest < 0){
-        av_log(avctx, AV_LOG_ERROR, "not enough data\n");
-        return -1;
     }
     if(flags & VB_HAS_VIDEO){
-        size = bytestream_get_le32(&c->stream);
-        if(size > rest || size<4){
+        size = bytestream2_get_le32(&c->stream);
+        if(size > bytestream2_get_bytes_left(&c->stream)+4 || size<4){
             av_log(avctx, AV_LOG_ERROR, "Frame size invalid\n");
             return -1;
         }
-        vb_decode_framedata(c, c->stream, size, offset);
-        c->stream += size - 4;
-        rest -= size;
+        vb_decode_framedata(c, offset);
+        bytestream2_skip(&c->stream, size - 4);
     }
     if(flags & VB_HAS_PALETTE){
-        size = bytestream_get_le32(&c->stream);
-        if(size > rest){
-            av_log(avctx, AV_LOG_ERROR, "Palette size is too big\n");
-            return -1;
-        }
+        size = bytestream2_get_le32(&c->stream);
         vb_decode_palette(c, size);
-        rest -= size;
     }
 
     memcpy(c->pic.data[1], c->pal, AVPALETTE_SIZE);
@@ -263,7 +242,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
     *(AVFrame*)data = c->pic;
 
     /* always report that the buffer was completely consumed */
-    return buf_size;
+    return avpkt->size;
 }
 
 static av_cold int decode_init(AVCodecContext *avctx)
diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 7d358238b2..9adfc968db 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -112,7 +112,8 @@ typedef struct WavpackFrameContext {
     int extra_bits;
     int and, or, shift;
     int post_shift;
-    int hybrid, hybrid_bitrate, hybrid_maxclip;
+    int hybrid, hybrid_bitrate;
+    int hybrid_maxclip, hybrid_minclip;
     int float_flag;
     int float_shift;
     int float_max_exp;
@@ -412,12 +413,12 @@ static inline int wv_get_value_integer(WavpackFrameContext *s, uint32_t *crc,
     }
 
     bit = (S & s->and) | s->or;
-    bit = (((S + bit) << s->shift) - bit) << s->post_shift;
+    bit = ((S + bit) << s->shift) - bit;
 
     if (s->hybrid)
-        bit = av_clip(bit, -s->hybrid_maxclip - 1, s->hybrid_maxclip);
+        bit = av_clip(bit, s->hybrid_minclip, s->hybrid_maxclip);
 
-    return bit;
+    return bit << s->post_shift;
 }
 
 static float wv_get_value_float(WavpackFrameContext *s, uint32_t *crc, int S)
@@ -763,7 +764,7 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
     const uint8_t *orig_buf = buf;
     const uint8_t *buf_end  = buf + buf_size;
     int i, j, id, size, ssize, weights, t;
-    int bpp, chan, chmask;
+    int bpp, chan, chmask, orig_bpp;
 
     if (buf_size == 0) {
         *got_frame_ptr = 0;
@@ -799,15 +800,16 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
     s->frame_flags = AV_RL32(buf); buf += 4;
     bpp = av_get_bytes_per_sample(avctx->sample_fmt);
     samples = (uint8_t*)samples + bpp * wc->ch_offset;
+    orig_bpp = ((s->frame_flags & 0x03) + 1) << 3;
 
     s->stereo         = !(s->frame_flags & WV_MONO);
     s->stereo_in      =  (s->frame_flags & WV_FALSE_STEREO) ? 0 : s->stereo;
     s->joint          =   s->frame_flags & WV_JOINT_STEREO;
     s->hybrid         =   s->frame_flags & WV_HYBRID_MODE;
     s->hybrid_bitrate =   s->frame_flags & WV_HYBRID_BITRATE;
-    s->hybrid_maxclip = (1LL << ((((s->frame_flags & 0x03) + 1) << 3) - 1)) - 1;
-    s->post_shift     = 8 * (bpp - 1 - (s->frame_flags & 0x03)) +
-                        ((s->frame_flags >> 13) & 0x1f);
+    s->post_shift     = bpp * 8 - orig_bpp + ((s->frame_flags >> 13) & 0x1f);
+    s->hybrid_maxclip = (( 1LL << (orig_bpp - 1)) - 1) >> s->post_shift;
+    s->hybrid_minclip = ((-1LL << (orig_bpp - 1)))     >> s->post_shift;
     s->CRC            = AV_RL32(buf); buf += 4;
     if (wc->mkv_mode)
         buf += 4; //skip block size;
@@ -968,6 +970,15 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
                 s->and   = 1;
                 s->shift = buf[3];
             }
+            /* original WavPack decoder forces 32-bit lossy sound to be treated
+             * as 24-bit one in order to have proper clipping
+             */
+            if (s->hybrid && bpp == 4 && s->post_shift < 8 && s->shift > 8) {
+                s->post_shift += 8;
+                s->shift      -= 8;
+                s->hybrid_maxclip >>= 8;
+                s->hybrid_minclip >>= 8;
+            }
             buf += 4;
             break;
         case WP_ID_FLOATINFO: