From 4da6d194e5b00404f4d545adcaa8e206592ae746 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Thu, 23 Feb 2012 08:19:13 +0100
Subject: libxvid: switch to encode2().

---
 libavcodec/libxvidff.c | 60 ++++++++++++++++++++++++++++++++------------------
 1 file changed, 39 insertions(+), 21 deletions(-)

(limited to 'libavcodec/libxvidff.c')

diff --git a/libavcodec/libxvidff.c b/libavcodec/libxvidff.c
index a11e4ac913..44580d1364 100644
--- a/libavcodec/libxvidff.c
+++ b/libavcodec/libxvidff.c
@@ -32,6 +32,7 @@
 #include "libavutil/intreadwrite.h"
 #include "libavutil/mathematics.h"
 #include "libxvid_internal.h"
+#include "mpegvideo.h"
 #if !HAVE_MKSTEMP
 #include <fcntl.h>
 #endif
@@ -73,7 +74,7 @@ struct xvid_ff_pass1 {
 };
 
 /* Prototypes - See function implementation for details */
-int xvid_strip_vol_header(AVCodecContext *avctx, unsigned char *frame, unsigned int header_len, unsigned int frame_len);
+int xvid_strip_vol_header(AVCodecContext *avctx, AVPacket *pkt, unsigned int header_len, unsigned int frame_len);
 int xvid_ff_2pass(void *ref, int opt, void *p1, void *p2);
 void xvid_correct_framerate(AVCodecContext *avctx);
 
@@ -408,17 +409,25 @@ static av_cold int xvid_encode_init(AVCodecContext *avctx)  {
  * @param data Pointer to AVFrame of unencoded frame
  * @return Returns 0 on success, -1 on failure
  */
-static int xvid_encode_frame(AVCodecContext *avctx,
-                         unsigned char *frame, int buf_size, void *data) {
-    int xerr, i;
+static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                             const AVFrame *picture, int *got_packet)
+{
+    int xerr, i, ret, user_packet = !!pkt->data;
     char *tmp;
     struct xvid_context *x = avctx->priv_data;
-    AVFrame *picture = data;
     AVFrame *p = &x->encoded_picture;
+    int mb_width   = (avctx->width  + 15) / 16;
+    int mb_height  = (avctx->height + 15) / 16;
 
     xvid_enc_frame_t xvid_enc_frame;
     xvid_enc_stats_t xvid_enc_stats;
 
+    if (!user_packet &&
+        (ret = av_new_packet(pkt, mb_width*mb_height*MAX_MB_BYTES + FF_MIN_BUFFER_SIZE)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
+        return ret;
+    }
+
     /* Start setting up the frame */
     memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame));
     xvid_enc_frame.version = XVID_VERSION;
@@ -427,8 +436,8 @@ static int xvid_encode_frame(AVCodecContext *avctx,
     *p = *picture;
 
     /* Let Xvid know where to put the frame. */
-    xvid_enc_frame.bitstream = frame;
-    xvid_enc_frame.length = buf_size;
+    xvid_enc_frame.bitstream = pkt->data;
+    xvid_enc_frame.length    = pkt->size;
 
     /* Initialize input image fields */
     if( avctx->pix_fmt != PIX_FMT_YUV420P ) {
@@ -488,7 +497,9 @@ static int xvid_encode_frame(AVCodecContext *avctx,
         }
     }
 
-    if( 0 <= xerr ) {
+    if (xerr > 0) {
+        *got_packet = 1;
+
         p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
         if( xvid_enc_stats.type == XVID_TYPE_PVOP )
             p->pict_type = AV_PICTURE_TYPE_P;
@@ -500,14 +511,21 @@ static int xvid_encode_frame(AVCodecContext *avctx,
             p->pict_type = AV_PICTURE_TYPE_I;
         if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
             p->key_frame = 1;
+            pkt->flags |= AV_PKT_FLAG_KEY;
             if( x->quicktime_format )
-                return xvid_strip_vol_header(avctx, frame,
+                return xvid_strip_vol_header(avctx, pkt,
                     xvid_enc_stats.hlength, xerr);
          } else
             p->key_frame = 0;
 
-        return xerr;
+        pkt->size = xerr;
+
+        return 0;
     } else {
+        if (!user_packet)
+            av_free_packet(pkt);
+        if (!xerr)
+            return 0;
         av_log(avctx, AV_LOG_ERROR, "Xvid: Encoding Error Occurred: %i\n", xerr);
         return -1;
     }
@@ -551,16 +569,16 @@ static av_cold int xvid_encode_close(AVCodecContext *avctx) {
  * @return Returns new length of frame data
  */
 int xvid_strip_vol_header(AVCodecContext *avctx,
-                  unsigned char *frame,
+                  AVPacket *pkt,
                   unsigned int header_len,
                   unsigned int frame_len) {
     int vo_len = 0, i;
 
     for( i = 0; i < header_len - 3; i++ ) {
-        if( frame[i] == 0x00 &&
-            frame[i+1] == 0x00 &&
-            frame[i+2] == 0x01 &&
-            frame[i+3] == 0xB6 ) {
+        if( pkt->data[i] == 0x00 &&
+            pkt->data[i+1] == 0x00 &&
+            pkt->data[i+2] == 0x01 &&
+            pkt->data[i+3] == 0xB6 ) {
             vo_len = i;
             break;
         }
@@ -570,15 +588,15 @@ int xvid_strip_vol_header(AVCodecContext *avctx,
         /* We need to store the header, so extract it */
         if( avctx->extradata == NULL ) {
             avctx->extradata = av_malloc(vo_len);
-            memcpy(avctx->extradata, frame, vo_len);
+            memcpy(avctx->extradata, pkt->data, vo_len);
             avctx->extradata_size = vo_len;
         }
         /* Less dangerous now, memmove properly copies the two
            chunks of overlapping data */
-        memmove(frame, &frame[vo_len], frame_len - vo_len);
-        return frame_len - vo_len;
-    } else
-        return frame_len;
+        memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
+        pkt->size = frame_len - vo_len;
+    }
+    return 0;
 }
 
 /**
@@ -814,7 +832,7 @@ AVCodec ff_libxvid_encoder = {
     .id             = CODEC_ID_MPEG4,
     .priv_data_size = sizeof(struct xvid_context),
     .init           = xvid_encode_init,
-    .encode         = xvid_encode_frame,
+    .encode2        = xvid_encode_frame,
     .close          = xvid_encode_close,
     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
     .long_name= NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
-- 
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