qsv: Drop some unused variables

[ffmpeg] / libavcodec / ra144dec.c

diff --git a/libavcodec/ra144dec.c b/libavcodec/ra144dec.c
index 5b391d4675058984383a80c9910c82fcd4448bbd..289535741fe2d4cf153eb7eb28c78e200142dcbb 100644 (file)
--- a/libavcodec/ra144dec.c
+++ b/libavcodec/ra144dec.c
@@ -5,26 +5,27 @@
  * Copyright (c) 2003 Nick Kurshev
  *     Based on public domain decoder at http://www.honeypot.net/audio
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "libavutil/intmath.h"
+#include "libavutil/channel_layout.h"
 #include "avcodec.h"
 #include "get_bits.h"
+#include "internal.h"
 #include "ra144.h"
 
 
@@ -37,7 +38,10 @@ static av_cold int ra144_decode_init(AVCodecContext * avctx)
     ractx->lpc_coef[0] = ractx->lpc_tables[0];
     ractx->lpc_coef[1] = ractx->lpc_tables[1];
 
-    avctx->sample_fmt = SAMPLE_FMT_S16;
+    avctx->channels       = 1;
+    avctx->channel_layout = AV_CH_LAYOUT_MONO;
+    avctx->sample_fmt     = AV_SAMPLE_FMT_S16;
+
     return 0;
 }
 
@@ -54,34 +58,42 @@ static void do_output_subblock(RA144Context *ractx, const uint16_t  *lpc_coefs,
 }
 
 /** Uncompress one block (20 bytes -> 160*2 bytes). */
-static int ra144_decode_frame(AVCodecContext * avctx, void *vdata,
-                              int *data_size, AVPacket *avpkt)
+static int ra144_decode_frame(AVCodecContext * avctx, void *data,
+                              int *got_frame_ptr, AVPacket *avpkt)
 {
+    AVFrame *frame     = data;
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
-    static const uint8_t sizes[10] = {6, 5, 5, 4, 4, 3, 3, 3, 3, 2};
-    unsigned int refl_rms[4];    // RMS of the reflection coefficients
-    uint16_t block_coefs[4][10]; // LPC coefficients of each sub-block
-    unsigned int lpc_refl[10];   // LPC reflection coefficients of the frame
+    static const uint8_t sizes[LPC_ORDER] = {6, 5, 5, 4, 4, 3, 3, 3, 3, 2};
+    unsigned int refl_rms[NBLOCKS];           // RMS of the reflection coefficients
+    uint16_t block_coefs[NBLOCKS][LPC_ORDER]; // LPC coefficients of each sub-block
+    unsigned int lpc_refl[LPC_ORDER];         // LPC reflection coefficients of the frame
     int i, j;
-    int16_t *data = vdata;
+    int ret;
+    int16_t *samples;
     unsigned int energy;
 
     RA144Context *ractx = avctx->priv_data;
     GetBitContext gb;
 
-    if (*data_size < 2*160)
-        return -1;
-
-    if(buf_size < 20) {
+    if (buf_size < FRAMESIZE) {
         av_log(avctx, AV_LOG_ERROR,
                "Frame too small (%d bytes). Truncated file?\n", buf_size);
-        *data_size = 0;
-        return buf_size;
+        *got_frame_ptr = 0;
+        return AVERROR_INVALIDDATA;
+    }
+
+    /* get output buffer */
+    frame->nb_samples = NBLOCKS * BLOCKSIZE;
+    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return ret;
     }
-    init_get_bits(&gb, buf, 20 * 8);
+    samples = (int16_t *)frame->data[0];
 
-    for (i=0; i<10; i++)
+    init_get_bits(&gb, buf, FRAMESIZE * 8);
+
+    for (i = 0; i < LPC_ORDER; i++)
         lpc_refl[i] = ff_lpc_refl_cb[i][get_bits(&gb, sizes[i])];
 
     ff_eval_coefs(ractx->lpc_coef[0], lpc_refl);
@@ -98,11 +110,11 @@ static int ra144_decode_frame(AVCodecContext * avctx, void *vdata,
 
     ff_int_to_int16(block_coefs[3], ractx->lpc_coef[0]);
 
-    for (i=0; i < 4; i++) {
+    for (i=0; i < NBLOCKS; i++) {
         do_output_subblock(ractx, block_coefs[i], refl_rms[i], &gb);
 
         for (j=0; j < BLOCKSIZE; j++)
-            *data++ = av_clip_int16(ractx->curr_sblock[j + 10] << 2);
+            *samples++ = av_clip_int16(ractx->curr_sblock[j + 10] << 2);
     }
 
     ractx->old_energy = energy;
@@ -110,19 +122,18 @@ static int ra144_decode_frame(AVCodecContext * avctx, void *vdata,
 
     FFSWAP(unsigned int *, ractx->lpc_coef[0], ractx->lpc_coef[1]);
 
-    *data_size = 2*160;
-    return 20;
+    *got_frame_ptr = 1;
+
+    return FRAMESIZE;
 }
 
-AVCodec ra_144_decoder =
-{
-    "real_144",
-    AVMEDIA_TYPE_AUDIO,
-    CODEC_ID_RA_144,
-    sizeof(RA144Context),
-    ra144_decode_init,
-    NULL,
-    NULL,
-    ra144_decode_frame,
-    .long_name = NULL_IF_CONFIG_SMALL("RealAudio 1.0 (14.4K)"),
+AVCodec ff_ra_144_decoder = {
+    .name           = "real_144",
+    .long_name      = NULL_IF_CONFIG_SMALL("RealAudio 1.0 (14.4K)"),
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = AV_CODEC_ID_RA_144,
+    .priv_data_size = sizeof(RA144Context),
+    .init           = ra144_decode_init,
+    .decode         = ra144_decode_frame,
+    .capabilities   = AV_CODEC_CAP_DR1,
 };