Split out intel H263 decoder.

Originally committed as revision 21054 to svn://svn.ffmpeg.org/ffmpeg/trunk

5 files changed, 137 insertions, 114 deletions

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index c0d633a23b..0fc153c170 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -124,7 +124,7 @@ OBJS-$(CONFIG_H261_ENCODER)            += h261enc.o h261.o             \
                                           mpegvideo_enc.o motion_est.o \
                                           ratecontrol.o mpeg12data.o   \
                                           mpegvideo.o
-OBJS-$(CONFIG_H263_DECODER)            += h263dec.o h263.o flvdec.o\
+OBJS-$(CONFIG_H263_DECODER)            += h263dec.o h263.o flvdec.o intelh263dec.o \
                                           mpegvideo.o error_resilience.o
 OBJS-$(CONFIG_H263_VAAPI_HWACCEL)      += vaapi_mpeg4.o
 OBJS-$(CONFIG_H263_ENCODER)            += mpegvideo_enc.o motion_est.o      \
diff --git a/libavcodec/h263.c b/libavcodec/h263.c
index 0576eec8e6..0065dbebdc 100644
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@@ -133,7 +133,7 @@ int h263_get_picture_format(int width, int height)
         return 7;
 }
 
-static void show_pict_info(MpegEncContext *s){
+void ff_h263_show_pict_info(MpegEncContext *s){
     av_log(s->avctx, AV_LOG_DEBUG, "qp:%d %c size:%d rnd:%d%s%s%s%s%s%s%s%s%s %d/%d\n",
          s->qscale, av_get_pict_type_char(s->pict_type),
          s->gb.size_in_bits, 1-s->no_rounding,
@@ -5359,7 +5359,7 @@ int h263_decode_picture_header(MpegEncContext *s)
     }
 
      if(s->avctx->debug&FF_DEBUG_PICT_INFO){
-        show_pict_info(s);
+        ff_h263_show_pict_info(s);
      }
     if (s->pict_type == FF_I_TYPE && s->codec_tag == AV_RL32("ZYGO")){
         int i,j;
@@ -6064,98 +6064,3 @@ end:
     s->avctx->has_b_frames= !s->low_delay;
     return decode_vop_header(s, gb);
 }
-
-/* don't understand why they choose a different header ! */
-int intel_h263_decode_picture_header(MpegEncContext *s)
-{
-    int format;
-
-    /* picture header */
-    if (get_bits_long(&s->gb, 22) != 0x20) {
-        av_log(s->avctx, AV_LOG_ERROR, "Bad picture start code\n");
-        return -1;
-    }
-    s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
-
-    if (get_bits1(&s->gb) != 1) {
-        av_log(s->avctx, AV_LOG_ERROR, "Bad marker\n");
-        return -1;      /* marker */
-    }
-    if (get_bits1(&s->gb) != 0) {
-        av_log(s->avctx, AV_LOG_ERROR, "Bad H263 id\n");
-        return -1;      /* h263 id */
-    }
-    skip_bits1(&s->gb);         /* split screen off */
-    skip_bits1(&s->gb);         /* camera  off */
-    skip_bits1(&s->gb);         /* freeze picture release off */
-
-    format = get_bits(&s->gb, 3);
-    if (format != 7) {
-        av_log(s->avctx, AV_LOG_ERROR, "Intel H263 free format not supported\n");
-        return -1;
-    }
-    s->h263_plus = 0;
-
-    s->pict_type = FF_I_TYPE + get_bits1(&s->gb);
-
-    s->unrestricted_mv = get_bits1(&s->gb);
-    s->h263_long_vectors = s->unrestricted_mv;
-
-    if (get_bits1(&s->gb) != 0) {
-        av_log(s->avctx, AV_LOG_ERROR, "SAC not supported\n");
-        return -1;      /* SAC: off */
-    }
-    s->obmc= get_bits1(&s->gb);
-    s->pb_frame = get_bits1(&s->gb);
-
-    if(format == 7){
-        format = get_bits(&s->gb, 3);
-        if(format == 0 || format == 7){
-            av_log(s->avctx, AV_LOG_ERROR, "Wrong Intel H263 format\n");
-            return -1;
-        }
-        if(get_bits(&s->gb, 2))
-            av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n");
-        s->loop_filter = get_bits1(&s->gb);
-        if(get_bits1(&s->gb))
-            av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n");
-        if(get_bits1(&s->gb))
-            s->pb_frame = 2;
-        if(get_bits(&s->gb, 5))
-            av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n");
-        if(get_bits(&s->gb, 5) != 1)
-            av_log(s->avctx, AV_LOG_ERROR, "Invalid marker\n");
-    }
-    if(format == 6){
-        int ar = get_bits(&s->gb, 4);
-        skip_bits(&s->gb, 9); // display width
-        skip_bits1(&s->gb);
-        skip_bits(&s->gb, 9); // display height
-        if(ar == 15){
-            skip_bits(&s->gb, 8); // aspect ratio - width
-            skip_bits(&s->gb, 8); // aspect ratio - height
-        }
-    }
-
-    s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
-    skip_bits1(&s->gb); /* Continuous Presence Multipoint mode: off */
-
-    if(s->pb_frame){
-        skip_bits(&s->gb, 3); //temporal reference for B-frame
-        skip_bits(&s->gb, 2); //dbquant
-    }
-
-    /* PEI */
-    while (get_bits1(&s->gb) != 0) {
-        skip_bits(&s->gb, 8);
-    }
-    s->f_code = 1;
-
-    s->y_dc_scale_table=
-    s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
-
-    if(s->avctx->debug&FF_DEBUG_PICT_INFO)
-        show_pict_info(s);
-
-    return 0;
-}
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index dda414d504..e63a210474 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -414,7 +414,7 @@ retry:
         }
         ret = ff_mpeg4_decode_picture_header(s, &s->gb);
     } else if (s->codec_id == CODEC_ID_H263I) {
-        ret = intel_h263_decode_picture_header(s);
+        ret = ff_intel_h263_decode_picture_header(s);
     } else if (CONFIG_FLV_DECODER && s->h263_flv) {
         ret = ff_flv_decode_picture_header(s);
     } else {
@@ -817,20 +817,6 @@ AVCodec wmv1_decoder = {
     .pix_fmts= ff_pixfmt_list_420,
 };
 
-AVCodec h263i_decoder = {
-    "h263i",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_H263I,
-    sizeof(MpegEncContext),
-    ff_h263_decode_init,
-    NULL,
-    ff_h263_decode_end,
-    ff_h263_decode_frame,
-    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
-    .long_name = NULL_IF_CONFIG_SMALL("Intel H.263"),
-    .pix_fmts= ff_pixfmt_list_420,
-};
-
 #if CONFIG_MPEG4_VDPAU_DECODER
 AVCodec mpeg4_vdpau_decoder = {
     "mpeg4_vdpau",
diff --git a/libavcodec/intelh263dec.c b/libavcodec/intelh263dec.c
new file mode 100644
index 0000000000..4a0078b8c4
--- /dev/null
+++ b/libavcodec/intelh263dec.c
@@ -0,0 +1,131 @@
+/*
+ * H.263i decoder
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "mpegvideo.h"
+
+/* don't understand why they choose a different header ! */
+int ff_intel_h263_decode_picture_header(MpegEncContext *s)
+{
+    int format;
+
+    /* picture header */
+    if (get_bits_long(&s->gb, 22) != 0x20) {
+        av_log(s->avctx, AV_LOG_ERROR, "Bad picture start code\n");
+        return -1;
+    }
+    s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
+
+    if (get_bits1(&s->gb) != 1) {
+        av_log(s->avctx, AV_LOG_ERROR, "Bad marker\n");
+        return -1;      /* marker */
+    }
+    if (get_bits1(&s->gb) != 0) {
+        av_log(s->avctx, AV_LOG_ERROR, "Bad H263 id\n");
+        return -1;      /* h263 id */
+    }
+    skip_bits1(&s->gb);         /* split screen off */
+    skip_bits1(&s->gb);         /* camera  off */
+    skip_bits1(&s->gb);         /* freeze picture release off */
+
+    format = get_bits(&s->gb, 3);
+    if (format != 7) {
+        av_log(s->avctx, AV_LOG_ERROR, "Intel H263 free format not supported\n");
+        return -1;
+    }
+    s->h263_plus = 0;
+
+    s->pict_type = FF_I_TYPE + get_bits1(&s->gb);
+
+    s->unrestricted_mv = get_bits1(&s->gb);
+    s->h263_long_vectors = s->unrestricted_mv;
+
+    if (get_bits1(&s->gb) != 0) {
+        av_log(s->avctx, AV_LOG_ERROR, "SAC not supported\n");
+        return -1;      /* SAC: off */
+    }
+    s->obmc= get_bits1(&s->gb);
+    s->pb_frame = get_bits1(&s->gb);
+
+    if(format == 7){
+        format = get_bits(&s->gb, 3);
+        if(format == 0 || format == 7){
+            av_log(s->avctx, AV_LOG_ERROR, "Wrong Intel H263 format\n");
+            return -1;
+        }
+        if(get_bits(&s->gb, 2))
+            av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n");
+        s->loop_filter = get_bits1(&s->gb);
+        if(get_bits1(&s->gb))
+            av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n");
+        if(get_bits1(&s->gb))
+            s->pb_frame = 2;
+        if(get_bits(&s->gb, 5))
+            av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n");
+        if(get_bits(&s->gb, 5) != 1)
+            av_log(s->avctx, AV_LOG_ERROR, "Invalid marker\n");
+    }
+    if(format == 6){
+        int ar = get_bits(&s->gb, 4);
+        skip_bits(&s->gb, 9); // display width
+        skip_bits1(&s->gb);
+        skip_bits(&s->gb, 9); // display height
+        if(ar == 15){
+            skip_bits(&s->gb, 8); // aspect ratio - width
+            skip_bits(&s->gb, 8); // aspect ratio - height
+        }
+    }
+
+    s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
+    skip_bits1(&s->gb); /* Continuous Presence Multipoint mode: off */
+
+    if(s->pb_frame){
+        skip_bits(&s->gb, 3); //temporal reference for B-frame
+        skip_bits(&s->gb, 2); //dbquant
+    }
+
+    /* PEI */
+    while (get_bits1(&s->gb) != 0) {
+        skip_bits(&s->gb, 8);
+    }
+    s->f_code = 1;
+
+    s->y_dc_scale_table=
+    s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
+
+    if(s->avctx->debug&FF_DEBUG_PICT_INFO)
+        ff_h263_show_pict_info(s);
+
+    return 0;
+}
+
+AVCodec h263i_decoder = {
+    "h263i",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_H263I,
+    sizeof(MpegEncContext),
+    ff_h263_decode_init,
+    NULL,
+    ff_h263_decode_end,
+    ff_h263_decode_frame,
+    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+    .long_name = NULL_IF_CONFIG_SMALL("Intel H.263"),
+    .pix_fmts= ff_pixfmt_list_420,
+};
+
diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
index 48bdcfcba9..269b8c8710 100644
--- a/libavcodec/mpegvideo.h
+++ b/libavcodec/mpegvideo.h
@@ -831,8 +831,9 @@ void ff_h263_loop_filter(MpegEncContext * s);
 void ff_set_qscale(MpegEncContext * s, int qscale);
 int ff_h263_decode_mba(MpegEncContext *s);
 void ff_h263_encode_mba(MpegEncContext *s);
+void ff_h263_show_pict_info(MpegEncContext *s);
 
-int intel_h263_decode_picture_header(MpegEncContext *s);
+int ff_intel_h263_decode_picture_header(MpegEncContext *s);
 int ff_h263_decode_mb(MpegEncContext *s,
                       DCTELEM block[6][64]);
 int ff_mpeg4_decode_mb(MpegEncContext *s,