Fix various unused variable warnings

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

ffmpeg.c

@@ -3720,7 +3720,7 @@ static void new_audio_stream(AVFormatContext *oc, int file_idx)
 static void new_data_stream(AVFormatContext *oc, int file_idx)
 {
     AVStream *st;
-    AVOutputStream *ost;
+    AVOutputStream *ost av_unused;
     AVCodec *codec=NULL;
     AVCodecContext *data_enc;
 

ffplay.c

@@ -1438,7 +1438,7 @@ static int queue_picture(VideoState *is, AVFrame *src_frame, double pts1, int64_
 
 static int get_video_frame(VideoState *is, AVFrame *frame, int64_t *pts, AVPacket *pkt)
 {
-    int len1, got_picture, i;
+    int len1 av_unused, got_picture, i;
 
     if (packet_queue_get(&is->videoq, pkt, 1) < 0)
         return -1;
@@ -1813,7 +1813,7 @@ static int subtitle_thread(void *arg)
     VideoState *is = arg;
     SubPicture *sp;
     AVPacket pkt1, *pkt = &pkt1;
-    int len1, got_subtitle;
+    int len1 av_unused, got_subtitle;
     double pts;
     int i, j;
     int r, g, b, y, u, v, a;

libavcodec/a64multienc.c

@@ -252,7 +252,6 @@ static int a64multi_encode_frame(AVCodecContext *avctx, unsigned char *buf,
     int b_width;
 
     int req_size;
-    int num_frames   = c->mc_lifetime;
 
     int *charmap     = c->mc_charmap;
     uint8_t *colram  = c->mc_colram;
@@ -280,7 +279,6 @@ static int a64multi_encode_frame(AVCodecContext *avctx, unsigned char *buf,
         if (!c->mc_lifetime) return 0;
         /* no more frames in queue, prepare to flush remaining frames */
         if (!c->mc_frame_counter) {
-            num_frames = c->mc_lifetime;
             c->mc_lifetime = 0;
         }
         /* still frames in queue so limit lifetime to remaining frames */

libavcodec/celp_filters.c

@@ -109,7 +109,7 @@ void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
     old_out2 = out[-2];
     old_out3 = out[-1];
     for (n = 0; n <= buffer_length - 4; n+=4) {
-        float tmp0,tmp1,tmp2,tmp3;
+        float tmp0,tmp1,tmp2;
         float val;
 
         out0 = in[0];
@@ -160,7 +160,6 @@ void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
         tmp0 = out0;
         tmp1 = out1;
         tmp2 = out2;
-        tmp3 = out3;
 
         out3 -= a * tmp2;
         out2 -= a * tmp1;

libavcodec/dca.c

@@ -1535,8 +1535,8 @@ static void dca_exss_parse_header(DCAContext *s)
 {
     int ss_index;
     int blownup;
-    int header_size;
-    int hd_size;
+    int header_size av_unused;
+    int hd_size av_unused;
     int num_audiop = 1;
     int num_assets = 1;
     int active_ss_mask[8];
@@ -1622,7 +1622,6 @@ static int dca_decode_frame(AVCodecContext * avctx,
 {
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
-    int data_size_tmp;
 
     int lfe_samples;
     int num_core_channels = 0;

libavcodec/dirac.c

@@ -245,7 +245,7 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
 int ff_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
                                    dirac_source_params *source)
 {
-    unsigned version_major, version_minor;
+    unsigned version_major, version_minor av_unused;
     unsigned video_format, picture_coding_mode;
 
     version_major  = svq3_get_ue_golomb(gb);

libavcodec/rv10.c

@@ -235,7 +235,7 @@ int rv_decode_dc(MpegEncContext *s, int n)
 /* read RV 1.0 compatible frame header */
 static int rv10_decode_picture_header(MpegEncContext *s)
 {
-    int mb_count, pb_frame, marker, unk, mb_xy;
+    int mb_count, pb_frame, marker, unk av_unused, mb_xy;
 
     marker = get_bits1(&s->gb);
 

libavcodec/s302m.c

@@ -29,7 +29,7 @@ static int s302m_parse_frame_header(AVCodecContext *avctx, const uint8_t *buf,
                                     int buf_size)
 {
     uint32_t h;
-    int frame_size, channels, id, bits;
+    int frame_size, channels, id av_unused, bits;
 
     if (buf_size <= AES3_HEADER_LEN) {
         av_log(avctx, AV_LOG_ERROR, "frame is too short\n");

libavcodec/shorten.c

@@ -196,7 +196,7 @@ static int decode_wave_header(AVCodecContext *avctx, uint8_t *header, int header
 {
     GetBitContext hb;
     int len;
-    int chunk_size;
+    int chunk_size av_unused;
     short wave_format;
 
     init_get_bits(&hb, header, header_size*8);

libavcodec/sp5xdec.c

@@ -38,15 +38,12 @@ static int sp5x_decode_frame(AVCodecContext *avctx,
     int buf_size = avpkt->size;
     AVPacket avpkt_recoded;
     const int qscale = 5;
-    const uint8_t *buf_ptr;
     uint8_t *recoded;
     int i = 0, j = 0;
 
     if (!avctx->width || !avctx->height)
         return -1;
 
-    buf_ptr = buf;
-
     recoded = av_mallocz(buf_size + 1024);
     if (!recoded)
         return -1;