Add stereo rematrixing support to the AC-3 encoders.

[ffmpeg] / libavcodec / dnxhddec.c

diff --git a/libavcodec/dnxhddec.c b/libavcodec/dnxhddec.c
index 3452d49629904641aa1d4aa5c5d4f2217a9e958b..67dd7fc60dc3dc9f55bafea3ba3b03ba37f42626 100644 (file)
--- a/libavcodec/dnxhddec.c
+++ b/libavcodec/dnxhddec.c
@@ -1,6 +1,6 @@
 /*
  * VC3/DNxHD decoder.
- * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
+ * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
  *
  * This file is part of FFmpeg.
  *
@@ -22,11 +22,11 @@
 //#define TRACE
 //#define DEBUG
 
+#include "libavcore/imgutils.h"
 #include "avcodec.h"
-#include "bitstream.h"
+#include "get_bits.h"
 #include "dnxhddata.h"
 #include "dsputil.h"
-#include "mpegvideo.h"
 
 typedef struct {
     AVCodecContext *avctx;
@@ -40,15 +40,15 @@ typedef struct {
     VLC ac_vlc, dc_vlc, run_vlc;
     int last_dc[3];
     DSPContext dsp;
-    DECLARE_ALIGNED_16(DCTELEM, blocks[8][64]);
-    DECLARE_ALIGNED_8(ScanTable, scantable);
+    DECLARE_ALIGNED(16, DCTELEM, blocks)[8][64];
+    ScanTable scantable;
     const CIDEntry *cid_table;
 } DNXHDContext;
 
 #define DNXHD_VLC_BITS 9
-#define DNXHD_DC_VLC_BITS 6
+#define DNXHD_DC_VLC_BITS 7
 
-static int dnxhd_decode_init(AVCodecContext *avctx)
+static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
 {
     DNXHDContext *ctx = avctx->priv_data;
 
@@ -56,6 +56,7 @@ static int dnxhd_decode_init(AVCodecContext *avctx)
     dsputil_init(&ctx->dsp, avctx);
     avctx->coded_frame = &ctx->picture;
     ctx->picture.type = FF_I_TYPE;
+    ctx->picture.key_frame = 1;
     return 0;
 }
 
@@ -72,7 +73,7 @@ static int dnxhd_init_vlc(DNXHDContext *ctx, int cid)
         init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
                  ctx->cid_table->ac_bits, 1, 1,
                  ctx->cid_table->ac_codes, 2, 2, 0);
-        init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, 12,
+        init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, ctx->cid_table->bit_depth+4,
                  ctx->cid_table->dc_bits, 1, 1,
                  ctx->cid_table->dc_codes, 1, 1, 0);
         init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
@@ -84,7 +85,7 @@ static int dnxhd_init_vlc(DNXHDContext *ctx, int cid)
     return 0;
 }
 
-static int dnxhd_decode_header(DNXHDContext *ctx, uint8_t *buf, int buf_size, int first_field)
+static int dnxhd_decode_header(DNXHDContext *ctx, const uint8_t *buf, int buf_size, int first_field)
 {
     static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 };
     int i;
@@ -99,7 +100,7 @@ static int dnxhd_decode_header(DNXHDContext *ctx, uint8_t *buf, int buf_size, in
     if (buf[5] & 2) { /* interlaced */
         ctx->cur_field = buf[5] & 1;
         ctx->picture.interlaced_frame = 1;
-        ctx->picture.top_field_first = first_field && ctx->cur_field == 1;
+        ctx->picture.top_field_first = first_field ^ ctx->cur_field;
         av_log(ctx->avctx, AV_LOG_DEBUG, "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
     }
 
@@ -127,12 +128,17 @@ static int dnxhd_decode_header(DNXHDContext *ctx, uint8_t *buf, int buf_size, in
     ctx->mb_width = ctx->width>>4;
     ctx->mb_height = buf[0x16d];
 
-    if (ctx->mb_height > 68) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "mb height too big\n");
+    dprintf(ctx->avctx, "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
+
+    if ((ctx->height+15)>>4 == ctx->mb_height && ctx->picture.interlaced_frame)
+        ctx->height <<= 1;
+
+    if (ctx->mb_height > 68 ||
+        (ctx->mb_height<<ctx->picture.interlaced_frame) > (ctx->height+15)>>4) {
+        av_log(ctx->avctx, AV_LOG_ERROR, "mb height too big: %d\n", ctx->mb_height);
         return -1;
     }
 
-    dprintf(ctx->avctx, "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
     for (i = 0; i < ctx->mb_height; i++) {
         ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i<<2));
         dprintf(ctx->avctx, "mb scan index %d\n", ctx->mb_scan_index[i]);
@@ -161,10 +167,10 @@ static void dnxhd_decode_dct_block(DNXHDContext *ctx, DCTELEM *block, int n, int
 
     if (n&2) {
         component = 1 + (n&1);
-        weigth_matrix = ctx->cid_table->chroma_weigth;
+        weigth_matrix = ctx->cid_table->chroma_weight;
     } else {
         component = 0;
-        weigth_matrix = ctx->cid_table->luma_weigth;
+        weigth_matrix = ctx->cid_table->luma_weight;
     }
 
     ctx->last_dc[component] += dnxhd_decode_dc(ctx);
@@ -189,22 +195,26 @@ static void dnxhd_decode_dct_block(DNXHDContext *ctx, DCTELEM *block, int n, int
             i += ctx->cid_table->run[index2];
         }
 
-        j = ctx->scantable.permutated[i];
-        //av_log(ctx->avctx, AV_LOG_DEBUG, "j %d\n", j);
-        //av_log(ctx->avctx, AV_LOG_DEBUG, "level %d, weigth %d\n", level, weigth_matrix[i]);
-        level = (2*level+1) * qscale * weigth_matrix[i];
-        if (weigth_matrix[i] != 32) // FIXME 10bit
-            level += 32;
-        level >>= 6;
-        level = (level^sign) - sign;
-
         if (i > 63) {
             av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
             return;
         }
 
+        j = ctx->scantable.permutated[i];
+        //av_log(ctx->avctx, AV_LOG_DEBUG, "j %d\n", j);
+        //av_log(ctx->avctx, AV_LOG_DEBUG, "level %d, weigth %d\n", level, weigth_matrix[i]);
+        level = (2*level+1) * qscale * weigth_matrix[i];
+        if (ctx->cid_table->bit_depth == 10) {
+            if (weigth_matrix[i] != 8)
+                level += 8;
+            level >>= 4;
+        } else {
+            if (weigth_matrix[i] != 32)
+                level += 32;
+            level >>= 6;
+        }
         //av_log(NULL, AV_LOG_DEBUG, "i %d, j %d, end level %d\n", i, j, level);
-        block[j] = level;
+        block[j] = (level^sign) - sign;
     }
 }
 
@@ -216,14 +226,12 @@ static int dnxhd_decode_macroblock(DNXHDContext *ctx, int x, int y)
     int dct_offset;
     int qscale, i;
 
-    ctx->dsp.clear_blocks(ctx->blocks[0]);
-    ctx->dsp.clear_blocks(ctx->blocks[2]); // FIXME change clear blocks to take block amount
-
     qscale = get_bits(&ctx->gb, 11);
     skip_bits1(&ctx->gb);
     //av_log(ctx->avctx, AV_LOG_DEBUG, "qscale %d\n", qscale);
 
     for (i = 0; i < 8; i++) {
+        ctx->dsp.clear_block(ctx->blocks[i]);
         dnxhd_decode_dct_block(ctx, ctx->blocks[i], i, qscale);
     }
 
@@ -259,13 +267,13 @@ static int dnxhd_decode_macroblock(DNXHDContext *ctx, int x, int y)
     return 0;
 }
 
-static int dnxhd_decode_macroblocks(DNXHDContext *ctx, uint8_t *buf, int buf_size)
+static int dnxhd_decode_macroblocks(DNXHDContext *ctx, const uint8_t *buf, int buf_size)
 {
     int x, y;
     for (y = 0; y < ctx->mb_height; y++) {
         ctx->last_dc[0] =
         ctx->last_dc[1] =
-        ctx->last_dc[2] = 1024; // 1024 for levels +128
+        ctx->last_dc[2] = 1<<(ctx->cid_table->bit_depth+2); // for levels +2^(bitdepth-1)
         init_get_bits(&ctx->gb, buf + ctx->mb_scan_index[y], (buf_size - ctx->mb_scan_index[y]) << 3);
         for (x = 0; x < ctx->mb_width; x++) {
             //START_TIMER;
@@ -277,8 +285,10 @@ static int dnxhd_decode_macroblocks(DNXHDContext *ctx, uint8_t *buf, int buf_siz
 }
 
 static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
-                              uint8_t *buf, int buf_size)
+                              AVPacket *avpkt)
 {
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
     DNXHDContext *ctx = avctx->priv_data;
     AVFrame *picture = data;
     int first_field = 1;
@@ -289,8 +299,15 @@ static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
     if (dnxhd_decode_header(ctx, buf, buf_size, first_field) < 0)
         return -1;
 
+    if ((avctx->width || avctx->height) &&
+        (ctx->width != avctx->width || ctx->height != avctx->height)) {
+        av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n",
+               avctx->width, avctx->height, ctx->width, ctx->height);
+        first_field = 1;
+    }
+
     avctx->pix_fmt = PIX_FMT_YUV422P;
-    if (avcodec_check_dimensions(avctx, ctx->width, ctx->height))
+    if (av_image_check_size(ctx->width, ctx->height, 0, avctx))
         return -1;
     avcodec_set_dimensions(avctx, ctx->width, ctx->height);
 
@@ -317,7 +334,7 @@ static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
     return buf_size;
 }
 
-static int dnxhd_decode_close(AVCodecContext *avctx)
+static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
 {
     DNXHDContext *ctx = avctx->priv_data;
 
@@ -331,7 +348,7 @@ static int dnxhd_decode_close(AVCodecContext *avctx)
 
 AVCodec dnxhd_decoder = {
     "dnxhd",
-    CODEC_TYPE_VIDEO,
+    AVMEDIA_TYPE_VIDEO,
     CODEC_ID_DNXHD,
     sizeof(DNXHDContext),
     dnxhd_decode_init,
@@ -339,4 +356,5 @@ AVCodec dnxhd_decoder = {
     dnxhd_decode_close,
     dnxhd_decode_frame,
     CODEC_CAP_DR1,
+    .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
 };