avcodec: Constify AVCodecs

[ffmpeg] / libavcodec / qpeg.c

diff --git a/libavcodec/qpeg.c b/libavcodec/qpeg.c
index d4195c5f0b7f145e7bbbf28dc894c8e0bed4b9ab..829e08aba1a962936ccadea4ed431c43cee78c03 100644 (file)
--- a/libavcodec/qpeg.c
+++ b/libavcodec/qpeg.c
@@ -26,11 +26,12 @@
 
 #include "avcodec.h"
 #include "bytestream.h"
+#include "decode.h"
 #include "internal.h"
 
 typedef struct QpegContext{
     AVCodecContext *avctx;
-    AVFrame *pic, *ref;
+    AVFrame *ref;
     uint32_t pal[256];
     GetByteContext buffer;
 } QpegContext;
@@ -101,8 +102,11 @@ static void qpeg_decode_intra(QpegContext *qctx, uint8_t *dst,
         } else {
             if (bytestream2_get_bytes_left(&qctx->buffer) < copy)
                 copy = bytestream2_get_bytes_left(&qctx->buffer);
-            for(i = 0; i < copy; i++) {
-                dst[filled++] = bytestream2_get_byte(&qctx->buffer);
+            while (copy > 0) {
+                int step = FFMIN(copy, width - filled);
+                bytestream2_get_bufferu(&qctx->buffer, dst + filled, step);
+                filled += step;
+                copy -= step;
                 if (filled >= width) {
                     filled = 0;
                     dst -= stride;
@@ -115,9 +119,9 @@ static void qpeg_decode_intra(QpegContext *qctx, uint8_t *dst,
     }
 }
 
-static const int qpeg_table_h[16] =
+static const uint8_t qpeg_table_h[16] =
  { 0x00, 0x20, 0x20, 0x20, 0x18, 0x10, 0x10, 0x20, 0x10, 0x08, 0x18, 0x08, 0x08, 0x18, 0x10, 0x04};
-static const int qpeg_table_w[16] =
+static const uint8_t qpeg_table_w[16] =
  { 0x00, 0x20, 0x18, 0x08, 0x18, 0x10, 0x20, 0x10, 0x08, 0x10, 0x20, 0x20, 0x08, 0x10, 0x18, 0x04};
 
 /* Decodes delta frames */
@@ -267,12 +271,10 @@ static int decode_frame(AVCodecContext *avctx,
 {
     uint8_t ctable[128];
     QpegContext * const a = avctx->priv_data;
-    AVFrame * const p = a->pic;
+    AVFrame * const p = data;
     AVFrame * const ref = a->ref;
     uint8_t* outdata;
-    int delta, ret;
-    int pal_size;
-    const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &pal_size);
+    int delta, intra, ret;
 
     if (avpkt->size < 0x86) {
         av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
@@ -281,9 +283,6 @@ static int decode_frame(AVCodecContext *avctx,
 
     bytestream2_init(&a->buffer, avpkt->data, avpkt->size);
 
-    av_frame_unref(ref);
-    av_frame_move_ref(ref, p);
-
     if ((ret = ff_get_buffer(avctx, p, AV_GET_BUFFER_FLAG_REF)) < 0)
         return ret;
     outdata = p->data[0];
@@ -292,24 +291,24 @@ static int decode_frame(AVCodecContext *avctx,
     bytestream2_skip(&a->buffer, 1);
 
     delta = bytestream2_get_byte(&a->buffer);
-    if(delta == 0x10) {
+    intra = delta == 0x10;
+    if (intra) {
         qpeg_decode_intra(a, outdata, p->linesize[0], avctx->width, avctx->height);
     } else {
         qpeg_decode_inter(a, outdata, p->linesize[0], avctx->width, avctx->height, delta, ctable, ref->data[0]);
     }
 
     /* make the palette available on the way out */
-    if (pal && pal_size == AVPALETTE_SIZE) {
-        p->palette_has_changed = 1;
-        memcpy(a->pal, pal, AVPALETTE_SIZE);
-    } else if (pal) {
-        av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", pal_size);
-    }
+    p->palette_has_changed = ff_copy_palette(a->pal, avpkt, avctx);
     memcpy(p->data[1], a->pal, AVPALETTE_SIZE);
 
-    if ((ret = av_frame_ref(data, p)) < 0)
+    av_frame_unref(ref);
+    if ((ret = av_frame_ref(ref, p)) < 0)
         return ret;
 
+    p->key_frame = intra;
+    p->pict_type = intra ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
+
     *got_frame      = 1;
 
     return avpkt->size;
@@ -320,6 +319,8 @@ static void decode_flush(AVCodecContext *avctx){
     int i, pal_size;
     const uint8_t *pal_src;
 
+    av_frame_unref(a->ref);
+
     pal_size = FFMIN(1024U, avctx->extradata_size);
     pal_src = avctx->extradata + avctx->extradata_size - pal_size;
 
@@ -331,7 +332,6 @@ static av_cold int decode_end(AVCodecContext *avctx)
 {
     QpegContext * const a = avctx->priv_data;
 
-    av_frame_free(&a->pic);
     av_frame_free(&a->ref);
 
     return 0;
@@ -343,19 +343,16 @@ static av_cold int decode_init(AVCodecContext *avctx){
     a->avctx = avctx;
     avctx->pix_fmt= AV_PIX_FMT_PAL8;
 
-    decode_flush(avctx);
-
-    a->pic = av_frame_alloc();
     a->ref = av_frame_alloc();
-    if (!a->pic || !a->ref) {
-        decode_end(avctx);
+    if (!a->ref)
         return AVERROR(ENOMEM);
-    }
+
+    decode_flush(avctx);
 
     return 0;
 }
 
-AVCodec ff_qpeg_decoder = {
+const AVCodec ff_qpeg_decoder = {
     .name           = "qpeg",
     .long_name      = NULL_IF_CONFIG_SMALL("Q-team QPEG"),
     .type           = AVMEDIA_TYPE_VIDEO,
@@ -366,4 +363,6 @@ AVCodec ff_qpeg_decoder = {
     .decode         = decode_frame,
     .flush          = decode_flush,
     .capabilities   = AV_CODEC_CAP_DR1,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
+                      FF_CODEC_CAP_INIT_CLEANUP,
 };