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lavd/avfoundation: Fix skewed video output

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Fixes ticket #5654.
The linesize can be greater than the minimum required. This copies the
frame taking linesize into account.

Signed-off-by: Rick Kern <kernrj@gmail.com>
This commit is contained in:
Rick Kern 2016-06-24 11:00:17 -04:00 committed by Carl Eugen Hoyos
parent e320f9576a
commit a259501e5a
1 changed files with 49 additions and 7 deletions
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56
libavdevice/avfoundation.m
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@ -35,6 +35,7 @@
#include "libavutil/internal.h"
#include "libavutil/parseutils.h"
#include "libavutil/time.h"
#include "libavutil/imgutils.h"
#include "avdevice.h"
static const int avf_time_base = 1000000;
@ -892,6 +893,49 @@ fail:
return AVERROR(EIO);
}
static int copy_cvpixelbuffer(AVFormatContext *s,
CVPixelBufferRef image_buffer,
AVPacket *pkt)
{
AVFContext *ctx = s->priv_data;
int src_linesize[4];
const uint8_t *src_data[4];
int width = CVPixelBufferGetWidth(image_buffer);
int height = CVPixelBufferGetHeight(image_buffer);
int status;
memset(src_linesize, 0, sizeof(src_linesize));
memset(src_data, 0, sizeof(src_data));
status = CVPixelBufferLockBaseAddress(image_buffer, 0);
if (status != kCVReturnSuccess) {
av_log(s, AV_LOG_ERROR, "Could not lock base address: %d\n", status);
return AVERROR_EXTERNAL;
}
if (CVPixelBufferIsPlanar(image_buffer)) {
size_t plane_count = CVPixelBufferGetPlaneCount(image_buffer);
int i;
for(i = 0; i < plane_count; i++){
src_linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(image_buffer, i);
src_data[i] = CVPixelBufferGetBaseAddressOfPlane(image_buffer, i);
}
} else {
src_linesize[0] = CVPixelBufferGetBytesPerRow(image_buffer);
src_data[0] = CVPixelBufferGetBaseAddress(image_buffer);
}
status = av_image_copy_to_buffer(pkt->data, pkt->size,
src_data, src_linesize,
ctx->pixel_format, width, height, 1);
CVPixelBufferUnlockBaseAddress(image_buffer, 0);
return status;
}
static int avf_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVFContext* ctx = (AVFContext*)s->priv_data;
@ -903,7 +947,7 @@ static int avf_read_packet(AVFormatContext *s, AVPacket *pkt)
image_buffer = CMSampleBufferGetImageBuffer(ctx->current_frame);
if (ctx->current_frame != nil) {
void *data;
int status;
if (av_new_packet(pkt, (int)CVPixelBufferGetDataSize(image_buffer)) < 0) {
return AVERROR(EIO);
}
@ -919,14 +963,12 @@ static int avf_read_packet(AVFormatContext *s, AVPacket *pkt)
pkt->stream_index = ctx->video_stream_index;
pkt->flags |= AV_PKT_FLAG_KEY;
CVPixelBufferLockBaseAddress(image_buffer, 0);
data = CVPixelBufferGetBaseAddress(image_buffer);
memcpy(pkt->data, data, pkt->size);
CVPixelBufferUnlockBaseAddress(image_buffer, 0);
status = copy_cvpixelbuffer(s, image_buffer, pkt);
CFRelease(ctx->current_frame);
ctx->current_frame = nil;
if (status < 0)
return status;
} else if (ctx->current_audio_frame != nil) {
CMBlockBufferRef block_buffer = CMSampleBufferGetDataBuffer(ctx->current_audio_frame);
int block_buffer_size = CMBlockBufferGetDataLength(block_buffer);