avcodec: Constify AVCodecs

[ffmpeg] / libavcodec / jpeglsdec.c

diff --git a/libavcodec/jpeglsdec.c b/libavcodec/jpeglsdec.c
index ef97bdb297b220aa55afc27be0ca6cdd099530a0..bf51d63c3aa71e644fa6aa066e87ddc55d69321d 100644 (file)
--- a/libavcodec/jpeglsdec.c
+++ b/libavcodec/jpeglsdec.c
@@ -108,9 +108,8 @@ int ff_jpegls_decode_lse(MJpegDecodeContext *s)
         if (s->palette_index > maxtab)
             return AVERROR_INVALIDDATA;
 
-        if ((s->avctx->pix_fmt == AV_PIX_FMT_GRAY8 || s->avctx->pix_fmt == AV_PIX_FMT_PAL8) &&
-            (s->picture_ptr->format == AV_PIX_FMT_GRAY8 || s->picture_ptr->format == AV_PIX_FMT_PAL8)) {
-            uint32_t *pal = (uint32_t *)s->picture_ptr->data[1];
+        if (s->avctx->pix_fmt == AV_PIX_FMT_GRAY8 || s->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
+            uint32_t *pal = s->palette;
             int shift = 0;
 
             if (s->avctx->bits_per_raw_sample > 0 && s->avctx->bits_per_raw_sample < 8) {
@@ -118,7 +117,6 @@ int ff_jpegls_decode_lse(MJpegDecodeContext *s)
                 shift = 8 - s->avctx->bits_per_raw_sample;
             }
 
-            s->picture_ptr->format =
             s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
             for (i=s->palette_index; i<=maxtab; i++) {
                 uint8_t k = i << shift;
@@ -149,7 +147,7 @@ static inline int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q)
 {
     int k, ret;
 
-    for (k = 0; (state->N[Q] << k) < state->A[Q]; k++)
+    for (k = 0; ((unsigned)state->N[Q] << k) < state->A[Q]; k++)
         ;
 
 #ifdef JLS_BROKEN
@@ -350,22 +348,24 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near,
 {
     int i, t = 0;
     uint8_t *zero, *last, *cur;
-    JLSState *state;
+    JLSState *state = s->jls_state;
     int off = 0, stride = 1, width, shift, ret = 0;
     int decoded_height = 0;
 
+    if (!state) {
+        state = av_malloc(sizeof(*state));
+        if (!state)
+            return AVERROR(ENOMEM);
+        s->jls_state = state;
+    }
     zero = av_mallocz(s->picture_ptr->linesize[0]);
     if (!zero)
         return AVERROR(ENOMEM);
     last = zero;
     cur  = s->picture_ptr->data[0];
 
-    state = av_mallocz(sizeof(JLSState));
-    if (!state) {
-        av_free(zero);
-        return AVERROR(ENOMEM);
-    }
     /* initialize JPEG-LS state from JPEG parameters */
+    memset(state, 0, sizeof(*state));
     state->near   = near;
     state->bpp    = (s->bits < 2) ? 2 : s->bits;
     state->maxval = s->maxval;
@@ -537,13 +537,12 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near,
     }
 
 end:
-    av_free(state);
     av_free(zero);
 
     return ret;
 }
 
-AVCodec ff_jpegls_decoder = {
+const AVCodec ff_jpegls_decoder = {
     .name           = "jpegls",
     .long_name      = NULL_IF_CONFIG_SMALL("JPEG-LS"),
     .type           = AVMEDIA_TYPE_VIDEO,