bindings/cxx: make sure the config value reference is kept

[libsigrok.git] / src / input / wav.c

diff --git a/src/input/wav.c b/src/input/wav.c
index 1b985edca632c3828ed4bd5ba6c857ede43c8bc6..f16db3a396304cb63a22a11540e7753766af9670 100644 (file)
--- a/src/input/wav.c
+++ b/src/input/wav.c
@@ -37,7 +37,7 @@
 #define MIN_DATA_CHUNK_OFFSET    45
 
 /* Expect to find the "data" chunk within this offset from the start. */
-#define MAX_DATA_CHUNK_OFFSET    256
+#define MAX_DATA_CHUNK_OFFSET    1024
 
 #define WAVE_FORMAT_PCM_         0x0001
 #define WAVE_FORMAT_IEEE_FLOAT_  0x0003
@@ -175,6 +175,9 @@ static int find_data_chunk(GString *buf, int initial_offset)
                offset += 8 + RL32(buf->str + offset + 4);
        }
 
+       if (offset > MAX_DATA_CHUNK_OFFSET)
+               return -1;
+
        return offset;
 }
 
@@ -184,7 +187,6 @@ static void send_chunk(const struct sr_input *in, int offset, int num_samples)
        struct sr_datafeed_analog_old analog;
        struct context *inc;
        float fdata[CHUNK_SIZE];
-       uint64_t sample;
        int total_samples, samplenum;
        char *s, *d;
 
@@ -196,18 +198,16 @@ static void send_chunk(const struct sr_input *in, int offset, int num_samples)
        total_samples = num_samples * inc->num_channels;
        for (samplenum = 0; samplenum < total_samples; samplenum++) {
                if (inc->fmt_code == WAVE_FORMAT_PCM_) {
-                       sample = 0;
-                       memcpy(&sample, s, inc->unitsize);
-                       switch (inc->samplesize) {
+                       switch (inc->unitsize) {
                        case 1:
                                /* 8-bit PCM samples are unsigned. */
-                               fdata[samplenum] = (uint8_t)sample / (float)255;
+                               fdata[samplenum] = *(uint8_t*)(s) / (float)255;
                                break;
                        case 2:
-                               fdata[samplenum] = RL16S(&sample) / (float)INT16_MAX;
+                               fdata[samplenum] = RL16S(s) / (float)INT16_MAX;
                                break;
                        case 4:
-                               fdata[samplenum] = RL32S(&sample) / (float)INT32_MAX;
+                               fdata[samplenum] = RL32S(s) / (float)INT32_MAX;
                                break;
                        }
                } else {
@@ -279,8 +279,8 @@ static int process_buffer(struct sr_input *in)
                offset = 0;
 
        /* Round off up to the last channels * unitsize boundary. */
-       chunk_samples = (in->buf->len - offset) / inc->num_channels / inc->unitsize;
-       max_chunk_samples = CHUNK_SIZE / inc->num_channels / inc->unitsize;
+       chunk_samples = (in->buf->len - offset) / inc->samplesize;
+       max_chunk_samples = CHUNK_SIZE / inc->samplesize;
        processed = 0;
        total_samples = chunk_samples;
        while (processed < total_samples) {
@@ -289,7 +289,7 @@ static int process_buffer(struct sr_input *in)
                else
                        num_samples = chunk_samples;
                send_chunk(in, offset, num_samples);
-               offset += num_samples * inc->unitsize;
+               offset += num_samples * inc->samplesize;
                chunk_samples -= num_samples;
                processed += num_samples;
        }