avcodec: Constify AVCodecs

[ffmpeg] / libavcodec / proresdec2.c

diff --git a/libavcodec/proresdec2.c b/libavcodec/proresdec2.c
index 6209c229c9d01821ac4c707e344367824e7ccba5..a57cece99be361ec94562f91bf090eab7b754aa7 100644 (file)
--- a/libavcodec/proresdec2.c
+++ b/libavcodec/proresdec2.c
@@ -29,6 +29,8 @@
 #define LONG_BITSTREAM_READER
 
 #include "libavutil/internal.h"
+#include "libavutil/mem_internal.h"
+
 #include "avcodec.h"
 #include "get_bits.h"
 #include "idctdsp.h"
@@ -289,7 +291,7 @@ static int decode_frame_header(ProresContext *ctx, const uint8_t *buf,
         }
         permute(ctx->qmat_chroma, ctx->prodsp.idct_permutation, ptr);
     } else {
-        memset(ctx->qmat_chroma, 4, 64);
+        memcpy(ctx->qmat_chroma, ctx->qmat_luma, 64);
     }
 
     return hdr_size;
@@ -621,8 +623,8 @@ static int decode_slice_thread(AVCodecContext *avctx, void *arg, int jobnr, int
     AVFrame *pic = ctx->frame;
     int i, hdr_size, qscale, log2_chroma_blocks_per_mb;
     int luma_stride, chroma_stride;
-    int y_data_size, u_data_size, v_data_size, a_data_size;
-    uint8_t *dest_y, *dest_u, *dest_v, *dest_a;
+    int y_data_size, u_data_size, v_data_size, a_data_size, offset;
+    uint8_t *dest_y, *dest_u, *dest_v;
     LOCAL_ALIGNED_16(int16_t, qmat_luma_scaled,  [64]);
     LOCAL_ALIGNED_16(int16_t, qmat_chroma_scaled,[64]);
     int mb_x_shift;
@@ -674,16 +676,16 @@ static int decode_slice_thread(AVCodecContext *avctx, void *arg, int jobnr, int
         log2_chroma_blocks_per_mb = 1;
     }
 
-    dest_y = pic->data[0] + (slice->mb_y << 4) * luma_stride + (slice->mb_x << 5);
+    offset = (slice->mb_y << 4) * luma_stride + (slice->mb_x << 5);
+    dest_y = pic->data[0] + offset;
     dest_u = pic->data[1] + (slice->mb_y << 4) * chroma_stride + (slice->mb_x << mb_x_shift);
     dest_v = pic->data[2] + (slice->mb_y << 4) * chroma_stride + (slice->mb_x << mb_x_shift);
-    dest_a = pic->data[3] + (slice->mb_y << 4) * luma_stride + (slice->mb_x << 5);
 
     if (ctx->frame_type && ctx->first_field ^ ctx->frame->top_field_first) {
         dest_y += pic->linesize[0];
         dest_u += pic->linesize[1];
         dest_v += pic->linesize[2];
-        dest_a += pic->linesize[3];
+        offset += pic->linesize[3];
     }
 
     ret = decode_slice_luma(avctx, slice, (uint16_t*)dest_y, luma_stride,
@@ -720,10 +722,12 @@ static int decode_slice_thread(AVCodecContext *avctx, void *arg, int jobnr, int
     }
 
     /* decode alpha plane if available */
-    if (ctx->alpha_info && pic->data[3] && a_data_size)
+    if (ctx->alpha_info && pic->data[3] && a_data_size) {
+        uint8_t *dest_a = pic->data[3] + offset;
         decode_slice_alpha(ctx, (uint16_t*)dest_a, luma_stride,
                            buf + y_data_size + u_data_size + v_data_size,
                            a_data_size, slice->mb_count);
+    }
 
     slice->ret = 0;
     return 0;
@@ -778,9 +782,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     buf += frame_hdr_size;
     buf_size -= frame_hdr_size;
 
-    if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0)
-        return ret;
-
  decode_picture:
     pic_size = decode_picture_header(avctx, buf, buf_size);
     if (pic_size < 0) {
@@ -788,6 +789,10 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
         return pic_size;
     }
 
+    if (ctx->first_field)
+        if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0)
+            return ret;
+
     if ((ret = decode_picture(avctx)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "error decoding picture\n");
         return ret;
@@ -806,17 +811,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     return avpkt->size;
 }
 
-#if HAVE_THREADS
-static int decode_init_thread_copy(AVCodecContext *avctx)
-{
-    ProresContext *ctx = avctx->priv_data;
-
-    ctx->slices = NULL;
-
-    return 0;
-}
-#endif
-
 static av_cold int decode_close(AVCodecContext *avctx)
 {
     ProresContext *ctx = avctx->priv_data;
@@ -826,14 +820,13 @@ static av_cold int decode_close(AVCodecContext *avctx)
     return 0;
 }
 
-AVCodec ff_prores_decoder = {
+const AVCodec ff_prores_decoder = {
     .name           = "prores",
-    .long_name      = NULL_IF_CONFIG_SMALL("ProRes (iCodec Pro)"),
+    .long_name      = NULL_IF_CONFIG_SMALL("Apple ProRes (iCodec Pro)"),
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_PRORES,
     .priv_data_size = sizeof(ProresContext),
     .init           = decode_init,
-    .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
     .close          = decode_close,
     .decode         = decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS,