avcodec: add a cook parser to get subpacket duration

Fixes jittery video playback of rm files with cook audio.

libavcodec/Makefile

@@ -620,6 +620,7 @@ OBJS-$(CONFIG_AC3_PARSER)              += ac3_parser.o ac3tab.o \
                                           aac_ac3_parser.o
 OBJS-$(CONFIG_ADX_PARSER)              += adx_parser.o adx.o
 OBJS-$(CONFIG_CAVSVIDEO_PARSER)        += cavs_parser.o
+OBJS-$(CONFIG_COOK_PARSER)             += cook_parser.o
 OBJS-$(CONFIG_DCA_PARSER)              += dca_parser.o
 OBJS-$(CONFIG_DIRAC_PARSER)            += dirac_parser.o
 OBJS-$(CONFIG_DNXHD_PARSER)            += dnxhd_parser.o

libavcodec/allcodecs.c

@@ -400,6 +400,7 @@ void avcodec_register_all(void)
     REGISTER_PARSER  (AC3, ac3);
     REGISTER_PARSER  (ADX, adx);
     REGISTER_PARSER  (CAVSVIDEO, cavsvideo);
+    REGISTER_PARSER  (COOK, cook);
     REGISTER_PARSER  (DCA, dca);
     REGISTER_PARSER  (DIRAC, dirac);
     REGISTER_PARSER  (DNXHD, dnxhd);

libavcodec/cook_parser.c

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Cook audio parser
+ *
+ * Determines subpacket duration from extradata.
+ */
+
+#include <stdint.h>
+
+#include "libavutil/intreadwrite.h"
+#include "parser.h"
+
+typedef struct CookParseContext {
+    int duration;
+} CookParseContext;
+
+static int cook_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
+                      const uint8_t **poutbuf, int *poutbuf_size,
+                      const uint8_t *buf, int buf_size)
+{
+    CookParseContext *s = s1->priv_data;
+
+    if (s->duration)
+        s1->duration = s->duration;
+    else if (avctx->extradata && avctx->extradata_size >= 8 && avctx->channels)
+        s->duration = AV_RB16(avctx->extradata + 4) / avctx->channels;
+
+    /* always return the full packet. this parser isn't doing any splitting or
+       combining, only setting packet duration */
+    *poutbuf      = buf;
+    *poutbuf_size = buf_size;
+    return buf_size;
+}
+
+AVCodecParser ff_cook_parser = {
+    .codec_ids      = { CODEC_ID_COOK },
+    .priv_data_size = sizeof(CookParseContext),
+    .parser_parse   = cook_parse,
+};

libavcodec/version.h

@@ -27,8 +27,8 @@
  */
 
 #define LIBAVCODEC_VERSION_MAJOR 54
-#define LIBAVCODEC_VERSION_MINOR 11
-#define LIBAVCODEC_VERSION_MICRO  1
+#define LIBAVCODEC_VERSION_MINOR 12
+#define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \

libavformat/rmdec.c

@@ -205,6 +205,7 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
             st->codec->block_align = coded_framesize;
             break;
         case CODEC_ID_COOK:
+            st->need_parsing = AVSTREAM_PARSE_HEADERS;
         case CODEC_ID_ATRAC3:
         case CODEC_ID_SIPR:
             avio_rb16(pb); avio_r8(pb);