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Return meaningful error codes, rather than always -1.

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Originally committed as revision 22966 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2010-04-26 19:40:15 +00:00
parent 2d0525c27c
commit c57a8fefd9
1 changed files with 17 additions and 17 deletions
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34
libavdevice/v4l2.c
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@ -164,7 +164,7 @@ static int device_open(AVFormatContext *ctx, uint32_t *capabilities)
av_log(ctx, AV_LOG_ERROR, "Cannot open video device %s : %s\n",
ctx->filename, strerror(errno));
return -1;
return AVERROR(errno);
}
res = ioctl(fd, VIDIOC_QUERYCAP, &cap);
@ -174,20 +174,20 @@ static int device_open(AVFormatContext *ctx, uint32_t *capabilities)
av_log(ctx, AV_LOG_ERROR, "QUERYCAP not implemented, probably V4L device but not supporting V4L2\n");
close(fd);
return -1;
return AVERROR(errno);
}
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n",
strerror(errno));
close(fd);
return -1;
return AVERROR(errno);
}
if ((cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) {
av_log(ctx, AV_LOG_ERROR, "Not a video capture device\n");
close(fd);
return -1;
return AVERROR(ENODEV);
}
*capabilities = cap.capabilities;
@ -299,27 +299,27 @@ static int mmap_init(AVFormatContext *ctx)
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_REQBUFS)\n");
}
return -1;
return AVERROR(errno);
}
if (req.count < 2) {
av_log(ctx, AV_LOG_ERROR, "Insufficient buffer memory\n");
return -1;
return AVERROR(ENOMEM);
}
s->buffers = req.count;
s->buf_start = av_malloc(sizeof(void *) * s->buffers);
if (s->buf_start == NULL) {
av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer pointers\n");
return -1;
return AVERROR(ENOMEM);
}
s->buf_len = av_malloc(sizeof(unsigned int) * s->buffers);
if (s->buf_len == NULL) {
av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer sizes\n");
av_free(s->buf_start);
return -1;
return AVERROR(ENOMEM);
}
for (i = 0; i < req.count; i++) {
@ -333,7 +333,7 @@ static int mmap_init(AVFormatContext *ctx)
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYBUF)\n");
return -1;
return AVERROR(errno);
}
s->buf_len[i] = buf.length;
@ -347,7 +347,7 @@ static int mmap_init(AVFormatContext *ctx)
if (s->buf_start[i] == MAP_FAILED) {
av_log(ctx, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
return -1;
return AVERROR(errno);
}
}
@ -405,13 +405,13 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
}
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_DQBUF): %s\n", strerror(errno));
return -1;
return AVERROR(errno);
}
assert (buf.index < s->buffers);
if (s->frame_size > 0 && buf.bytesused != s->frame_size) {
av_log(ctx, AV_LOG_ERROR, "The v4l2 frame is %d bytes, but %d bytes are expected\n", buf.bytesused, s->frame_size);
return -1;
return AVERROR_INVALIDDATA;
}
/* Image is at s->buff_start[buf.index] */
@ -427,7 +427,7 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
av_log(ctx, AV_LOG_ERROR, "Failed to allocate a buffer descriptor\n");
res = ioctl (s->fd, VIDIOC_QBUF, &buf);
return -1;
return AVERROR(ENOMEM);
}
buf_descriptor->fd = s->fd;
buf_descriptor->index = buf.index;
@ -459,7 +459,7 @@ static int mmap_start(AVFormatContext *ctx)
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", strerror(errno));
return -1;
return AVERROR(errno);
}
}
@ -468,7 +468,7 @@ static int mmap_start(AVFormatContext *ctx)
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n", strerror(errno));
return -1;
return AVERROR(errno);
}
return 0;
@ -588,11 +588,11 @@ static int v4l2_read_header(AVFormatContext *s1, AVFormatParameters *ap)
if (ap->width <= 0 || ap->height <= 0) {
av_log(s1, AV_LOG_ERROR, "Wrong size (%dx%d)\n", ap->width, ap->height);
return -1;
return AVERROR(EINVAL);
}
if(avcodec_check_dimensions(s1, ap->width, ap->height) < 0)
return -1;
return AVERROR(EINVAL);
st = av_new_stream(s1, 0);
if (!st) {