[vlc-devel] [PATCH 2/2] copy: only copy the src_pitch pixels on each line not the whole width
Steve Lhomme
robux4 at gmail.com
Thu Jul 28 15:03:39 CEST 2016
On Thu, Jul 28, 2016 at 2:58 PM, Jean-Baptiste Kempf <jb at videolan.org> wrote:
> How does that work if you have an offset?
The pitch includes the offset data. They are copied as well. It
doesn't change from before. Pixels outside of the i_visible_pitch are
also copied. That changes from before where some optimization was
possible.
> On 28 Jul, Steve Lhomme wrote :
>> ---
>> modules/codec/avcodec/vaapi.c | 6 +--
>> modules/codec/avcodec/vda.c | 2 +-
>> modules/codec/omxil/utils.c | 2 +-
>> modules/video_chroma/copy.c | 101 ++++++++++++++++-------------------
>> modules/video_chroma/copy.h | 14 ++---
>> modules/video_chroma/cvpx_i420.c | 1 -
>> modules/video_chroma/d3d11_surface.c | 9 ++--
>> modules/video_chroma/dxa9.c | 9 ++--
>> modules/video_chroma/i420_nv12.c | 1 -
>> 9 files changed, 60 insertions(+), 85 deletions(-)
>>
>> diff --git a/modules/codec/avcodec/vaapi.c b/modules/codec/avcodec/vaapi.c
>> index d66047d..937a3ef 100644
>> --- a/modules/codec/avcodec/vaapi.c
>> +++ b/modules/codec/avcodec/vaapi.c
>> @@ -121,8 +121,7 @@ static int Extract( vlc_va_t *va, picture_t *p_picture, uint8_t *data )
>> pp_plane[i] = (uint8_t*)p_base + image.offsets[i_src_plane];
>> pi_pitch[i] = image.pitches[i_src_plane];
>> }
>> - CopyFromYv12( p_picture, pp_plane, pi_pitch, sys->width, sys->height,
>> - &sys->image_cache );
>> + CopyFromYv12( p_picture, pp_plane, pi_pitch, sys->height, &sys->image_cache );
>> }
>> else
>> {
>> @@ -135,8 +134,7 @@ static int Extract( vlc_va_t *va, picture_t *p_picture, uint8_t *data )
>> pp_plane[i] = (uint8_t*)p_base + image.offsets[i];
>> pi_pitch[i] = image.pitches[i];
>> }
>> - CopyFromNv12( p_picture, pp_plane, pi_pitch, sys->width, sys->height,
>> - &sys->image_cache );
>> + CopyFromNv12( p_picture, pp_plane, pi_pitch, sys->height, &sys->image_cache );
>> }
>>
>> vaUnmapBuffer(sys->hw_ctx.display, image.buf);
>> diff --git a/modules/codec/avcodec/vda.c b/modules/codec/avcodec/vda.c
>> index e5ff1b5..cb4070e 100644
>> --- a/modules/codec/avcodec/vda.c
>> +++ b/modules/codec/avcodec/vda.c
>> @@ -69,7 +69,7 @@ static void copy420YpCbCr8Planar(picture_t *p_pic,
>> pi_pitch[i] = CVPixelBufferGetBytesPerRowOfPlane(buffer, i);
>> }
>>
>> - CopyFromNv12ToI420(p_pic, pp_plane, pi_pitch, i_width, i_height);
>> + CopyFromNv12ToI420(p_pic, pp_plane, pi_pitch, i_height);
>>
>> CVPixelBufferUnlockBaseAddress(buffer, 0);
>> }
>> diff --git a/modules/codec/omxil/utils.c b/modules/codec/omxil/utils.c
>> index aa2cb5f..abb5b0c 100644
>> --- a/modules/codec/omxil/utils.c
>> +++ b/modules/codec/omxil/utils.c
>> @@ -223,7 +223,7 @@ void CopyOmxPicture( int i_color_format, picture_t *p_pic,
>> copy_cache_t *p_surface_cache = (copy_cache_t*)p_architecture_specific->data;
>> uint8_t *ppi_src_pointers[2] = { p_src, p_src + i_src_stride * i_slice_height };
>> size_t pi_src_strides[2] = { i_src_stride, i_src_stride };
>> - CopyFromNv12( p_pic, ppi_src_pointers, pi_src_strides, i_src_stride, i_slice_height, p_surface_cache );
>> + CopyFromNv12( p_pic, ppi_src_pointers, pi_src_strides, i_slice_height, p_surface_cache );
>> return;
>> }
>> #endif
>> diff --git a/modules/video_chroma/copy.c b/modules/video_chroma/copy.c
>> index fa0a212..c053282 100644
>> --- a/modules/video_chroma/copy.c
>> +++ b/modules/video_chroma/copy.c
>> @@ -264,14 +264,14 @@ static void SSE_SplitUV(uint8_t *dstu, size_t dstu_pitch,
>> static void SSE_CopyPlane(uint8_t *dst, size_t dst_pitch,
>> const uint8_t *src, size_t src_pitch,
>> uint8_t *cache, size_t cache_size,
>> - unsigned width, unsigned height, unsigned cpu)
>> + unsigned height, unsigned cpu)
>> {
>> - const unsigned w16 = (width+15) & ~15;
>> + const unsigned w16 = (src_pitch+15) & ~15;
>> const unsigned hstep = cache_size / w16;
>> assert(hstep > 0);
>>
>> if (src_pitch == dst_pitch)
>> - memcpy(dst, src, width * height);
>> + memcpy(dst, src, src_pitch * height);
>> else
>> for (unsigned y = 0; y < height; y += hstep) {
>> const unsigned hblock = __MIN(hstep, height - y);
>> @@ -279,12 +279,12 @@ static void SSE_CopyPlane(uint8_t *dst, size_t dst_pitch,
>> /* Copy a bunch of line into our cache */
>> CopyFromUswc(cache, w16,
>> src, src_pitch,
>> - width, hblock, cpu);
>> + src_pitch, hblock, cpu);
>>
>> /* Copy from our cache to the destination */
>> Copy2d(dst, dst_pitch,
>> cache, w16,
>> - width, hblock);
>> + src_pitch, hblock);
>>
>> /* */
>> src += src_pitch * hblock;
>> @@ -296,9 +296,9 @@ static void SSE_SplitPlanes(uint8_t *dstu, size_t dstu_pitch,
>> uint8_t *dstv, size_t dstv_pitch,
>> const uint8_t *src, size_t src_pitch,
>> uint8_t *cache, size_t cache_size,
>> - unsigned width, unsigned height, unsigned cpu)
>> + unsigned height, unsigned cpu)
>> {
>> - const unsigned w16 = (2*width+15) & ~15;
>> + const unsigned w16 = (2*src_pitch+15) & ~15;
>> const unsigned hstep = cache_size / w16;
>> assert(hstep > 0);
>>
>> @@ -307,11 +307,11 @@ static void SSE_SplitPlanes(uint8_t *dstu, size_t dstu_pitch,
>>
>> /* Copy a bunch of line into our cache */
>> CopyFromUswc(cache, w16, src, src_pitch,
>> - 2*width, hblock, cpu);
>> + 2*src_pitch, hblock, cpu);
>>
>> /* Copy from our cache to the destination */
>> SSE_SplitUV(dstu, dstu_pitch, dstv, dstv_pitch,
>> - cache, w16, width, hblock, cpu);
>> + cache, w16, src_pitch, hblock, cpu);
>>
>> /* */
>> src += src_pitch * hblock;
>> @@ -322,24 +322,24 @@ static void SSE_SplitPlanes(uint8_t *dstu, size_t dstu_pitch,
>>
>> static void SSE_CopyFromNv12(picture_t *dst,
>> uint8_t *src[2], size_t src_pitch[2],
>> - unsigned width, unsigned height,
>> + unsigned height,
>> copy_cache_t *cache, unsigned cpu)
>> {
>> SSE_CopyPlane(dst->p[0].p_pixels, dst->p[0].i_pitch,
>> src[0], src_pitch[0],
>> cache->buffer, cache->size,
>> - width, height, cpu);
>> + height, cpu);
>> SSE_SplitPlanes(dst->p[2].p_pixels, dst->p[2].i_pitch,
>> dst->p[1].p_pixels, dst->p[1].i_pitch,
>> src[1], src_pitch[1],
>> cache->buffer, cache->size,
>> - (width+1)/2, (height+1)/2, cpu);
>> + (height+1)/2, cpu);
>> asm volatile ("emms");
>> }
>>
>> static void SSE_CopyFromYv12(picture_t *dst,
>> uint8_t *src[3], size_t src_pitch[3],
>> - unsigned width, unsigned height,
>> + unsigned height,
>> copy_cache_t *cache, unsigned cpu)
>> {
>> for (unsigned n = 0; n < 3; n++) {
>> @@ -347,7 +347,7 @@ static void SSE_CopyFromYv12(picture_t *dst,
>> SSE_CopyPlane(dst->p[n].p_pixels, dst->p[n].i_pitch,
>> src[n], src_pitch[n],
>> cache->buffer, cache->size,
>> - (width+d-1)/d, (height+d-1)/d, cpu);
>> + (height+d-1)/d, cpu);
>> }
>> asm volatile ("emms");
>> }
>> @@ -355,33 +355,33 @@ static void SSE_CopyFromYv12(picture_t *dst,
>>
>> static void SSE_CopyFromNv12ToNv12(picture_t *dst,
>> uint8_t *src[2], size_t src_pitch[2],
>> - unsigned width, unsigned height,
>> + unsigned height,
>> copy_cache_t *cache, unsigned cpu)
>> {
>> SSE_CopyPlane(dst->p[0].p_pixels, dst->p[0].i_pitch,
>> src[0], src_pitch[0],
>> cache->buffer, cache->size,
>> - width, height, cpu);
>> + height, cpu);
>> SSE_CopyPlane(dst->p[1].p_pixels, dst->p[1].i_pitch,
>> src[1], src_pitch[1],
>> cache->buffer, cache->size,
>> - width, height/2, cpu);
>> + height/2, cpu);
>> asm volatile ("emms");
>> }
>>
>> static void SSE_CopyFromI420ToNv12(picture_t *dst,
>> uint8_t *src[2], size_t src_pitch[2],
>> - unsigned width, unsigned height,
>> + unsigned height,
>> copy_cache_t *cache, unsigned cpu)
>> {
>> SSE_CopyPlane(dst->p[0].p_pixels, dst->p[0].i_pitch,
>> src[0], src_pitch[0],
>> cache->buffer, cache->size,
>> - width, height, cpu);
>> + height, cpu);
>>
>> /* TODO optimise the plane merging */
>> const unsigned copy_lines = height / 2;
>> - const unsigned copy_pitch = width / 2;
>> + const unsigned copy_pitch = src_pitch[1];
>>
>> const int i_extra_pitch_uv = dst->p[1].i_pitch - 2 * copy_pitch;
>> const int i_extra_pitch_u = src_pitch[U_PLANE] - copy_pitch;
>> @@ -408,13 +408,13 @@ static void SSE_CopyFromI420ToNv12(picture_t *dst,
>>
>> static void CopyPlane(uint8_t *dst, size_t dst_pitch,
>> const uint8_t *src, size_t src_pitch,
>> - unsigned width, unsigned height)
>> + unsigned height)
>> {
>> if (src_pitch == dst_pitch)
>> - memcpy(dst, src, width * height);
>> + memcpy(dst, src, src_pitch * height);
>> else
>> for (unsigned y = 0; y < height; y++) {
>> - memcpy(dst, src, width);
>> + memcpy(dst, src, src_pitch);
>> src += src_pitch;
>> dst += dst_pitch;
>> }
>> @@ -423,10 +423,10 @@ static void CopyPlane(uint8_t *dst, size_t dst_pitch,
>> static void SplitPlanes(uint8_t *dstu, size_t dstu_pitch,
>> uint8_t *dstv, size_t dstv_pitch,
>> const uint8_t *src, size_t src_pitch,
>> - unsigned width, unsigned height)
>> + unsigned height)
>> {
>> for (unsigned y = 0; y < height; y++) {
>> - for (unsigned x = 0; x < width; x++) {
>> + for (unsigned x = 0; x < src_pitch; x++) {
>> dstu[x] = src[2*x+0];
>> dstv[x] = src[2*x+1];
>> }
>> @@ -437,79 +437,69 @@ static void SplitPlanes(uint8_t *dstu, size_t dstu_pitch,
>> }
>>
>> void CopyFromNv12(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
>> - unsigned width, unsigned height,
>> - copy_cache_t *cache)
>> + unsigned height, copy_cache_t *cache)
>> {
>> #ifdef CAN_COMPILE_SSE2
>> unsigned cpu = vlc_CPU();
>> if (vlc_CPU_SSE2())
>> - return SSE_CopyFromNv12(dst, src, src_pitch, width, height,
>> + return SSE_CopyFromNv12(dst, src, src_pitch, height,
>> cache, cpu);
>> #else
>> (void) cache;
>> #endif
>>
>> CopyPlane(dst->p[0].p_pixels, dst->p[0].i_pitch,
>> - src[0], src_pitch[0],
>> - width, height);
>> + src[0], src_pitch[0], height);
>> SplitPlanes(dst->p[2].p_pixels, dst->p[2].i_pitch,
>> dst->p[1].p_pixels, dst->p[1].i_pitch,
>> - src[1], src_pitch[1],
>> - width/2, height/2);
>> + src[1], src_pitch[1], height/2);
>> }
>>
>> void CopyFromNv12ToNv12(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
>> - unsigned width, unsigned height,
>> - copy_cache_t *cache)
>> + unsigned height, copy_cache_t *cache)
>> {
>> #ifdef CAN_COMPILE_SSE2
>> unsigned cpu = vlc_CPU();
>> if (vlc_CPU_SSE2())
>> - return SSE_CopyFromNv12ToNv12(dst, src, src_pitch, width, height,
>> + return SSE_CopyFromNv12ToNv12(dst, src, src_pitch, height,
>> cache, cpu);
>> #else
>> (void) cache;
>> #endif
>>
>> CopyPlane(dst->p[0].p_pixels, dst->p[0].i_pitch,
>> - src[0], src_pitch[0],
>> - width, height);
>> + src[0], src_pitch[0], height);
>> CopyPlane(dst->p[1].p_pixels, dst->p[1].i_pitch,
>> - src[1], src_pitch[1],
>> - width, height/2);
>> + src[1], src_pitch[1], height/2);
>> }
>>
>> void CopyFromNv12ToI420(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
>> - unsigned width, unsigned height)
>> + unsigned height)
>> {
>> CopyPlane(dst->p[0].p_pixels, dst->p[0].i_pitch,
>> - src[0], src_pitch[0],
>> - width, height);
>> + src[0], src_pitch[0], height);
>> SplitPlanes(dst->p[1].p_pixels, dst->p[1].i_pitch,
>> dst->p[2].p_pixels, dst->p[2].i_pitch,
>> - src[1], src_pitch[1],
>> - width/2, height/2);
>> + src[1], src_pitch[1], height/2);
>> }
>>
>> void CopyFromI420ToNv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
>> - unsigned width, unsigned height,
>> - copy_cache_t *cache)
>> + unsigned height, copy_cache_t *cache)
>> {
>> #ifdef CAN_COMPILE_SSE2
>> unsigned cpu = vlc_CPU();
>> if (vlc_CPU_SSE2())
>> - return SSE_CopyFromI420ToNv12(dst, src, src_pitch, width, height,
>> + return SSE_CopyFromI420ToNv12(dst, src, src_pitch, height,
>> cache, cpu);
>> #else
>> (void) cache;
>> #endif
>>
>> CopyPlane(dst->p[0].p_pixels, dst->p[0].i_pitch,
>> - src[0], src_pitch[0],
>> - width, height);
>> + src[0], src_pitch[0], height);
>>
>> const unsigned copy_lines = height / 2;
>> - const unsigned copy_pitch = width / 2;
>> + const unsigned copy_pitch = src_pitch[1];
>>
>> const int i_extra_pitch_uv = dst->p[1].i_pitch - 2 * copy_pitch;
>> const int i_extra_pitch_u = src_pitch[U_PLANE] - copy_pitch;
>> @@ -533,22 +523,21 @@ void CopyFromI420ToNv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
>>
>>
>> void CopyFromYv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
>> - unsigned width, unsigned height,
>> - copy_cache_t *cache)
>> + unsigned height, copy_cache_t *cache)
>> {
>> #ifdef CAN_COMPILE_SSE2
>> unsigned cpu = vlc_CPU();
>> if (vlc_CPU_SSE2())
>> - return SSE_CopyFromYv12(dst, src, src_pitch, width, height,
>> + return SSE_CopyFromYv12(dst, src, src_pitch, height,
>> cache, cpu);
>> #else
>> (void) cache;
>> #endif
>>
>> CopyPlane(dst->p[0].p_pixels, dst->p[0].i_pitch,
>> - src[0], src_pitch[0], width, height);
>> + src[0], src_pitch[0], height);
>> CopyPlane(dst->p[1].p_pixels, dst->p[1].i_pitch,
>> - src[1], src_pitch[1], width / 2, height / 2);
>> + src[1], src_pitch[1], height / 2);
>> CopyPlane(dst->p[2].p_pixels, dst->p[2].i_pitch,
>> - src[2], src_pitch[2], width / 2, height / 2);
>> + src[2], src_pitch[2], height / 2);
>> }
>> diff --git a/modules/video_chroma/copy.h b/modules/video_chroma/copy.h
>> index 533e2fa..8776f95 100644
>> --- a/modules/video_chroma/copy.h
>> +++ b/modules/video_chroma/copy.h
>> @@ -36,22 +36,18 @@ void CopyCleanCache(copy_cache_t *cache);
>>
>> /* Copy planes from NV12 to YV12 */
>> void CopyFromNv12(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
>> - unsigned width, unsigned height,
>> - copy_cache_t *cache);
>> + unsigned height, copy_cache_t *cache);
>> /* Copy planes from YV12 to YV12 */
>> void CopyFromYv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
>> - unsigned width, unsigned height,
>> - copy_cache_t *cache);
>> + unsigned height, copy_cache_t *cache);
>>
>> void CopyFromNv12ToNv12(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
>> - unsigned width, unsigned height,
>> - copy_cache_t *cache);
>> + unsigned height, copy_cache_t *cache);
>>
>> void CopyFromNv12ToI420(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
>> - unsigned width, unsigned height);
>> + unsigned height);
>>
>> void CopyFromI420ToNv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
>> - unsigned width, unsigned height,
>> - copy_cache_t *cache);
>> + unsigned height, copy_cache_t *cache);
>>
>> #endif
>> diff --git a/modules/video_chroma/cvpx_i420.c b/modules/video_chroma/cvpx_i420.c
>> index 18ed3cf..471f867 100644
>> --- a/modules/video_chroma/cvpx_i420.c
>> +++ b/modules/video_chroma/cvpx_i420.c
>> @@ -89,7 +89,6 @@ static void CVPX_I420(filter_t *p_filter, picture_t *sourcePicture, picture_t *d
>> }
>>
>> CopyFromNv12ToI420(destinationPicture, pp_plane, pi_pitch,
>> - sourcePicture->format.i_width,
>> sourcePicture->format.i_height);
>>
>> CVPixelBufferUnlockBaseAddress(picsys->pixelBuffer, 0);
>> diff --git a/modules/video_chroma/d3d11_surface.c b/modules/video_chroma/d3d11_surface.c
>> index 3fbf4bf..76eb284 100644
>> --- a/modules/video_chroma/d3d11_surface.c
>> +++ b/modules/video_chroma/d3d11_surface.c
>> @@ -153,8 +153,7 @@ static void D3D11_YUY2(filter_t *p_filter, picture_t *src, picture_t *dst)
>> + pitch[1] * src->format.i_height / 2,
>> };
>>
>> - CopyFromYv12(dst, plane, pitch, src->format.i_width,
>> - src->format.i_height, &sys->cache);
>> + CopyFromYv12(dst, plane, pitch, src->format.i_height, &sys->cache);
>> } else if (desc.Format == DXGI_FORMAT_NV12) {
>> uint8_t *plane[2] = {
>> lock.pData,
>> @@ -164,8 +163,7 @@ static void D3D11_YUY2(filter_t *p_filter, picture_t *src, picture_t *dst)
>> lock.RowPitch,
>> lock.RowPitch,
>> };
>> - CopyFromNv12(dst, plane, pitch, src->format.i_width,
>> - src->format.i_height, &sys->cache);
>> + CopyFromNv12(dst, plane, pitch, src->format.i_height, &sys->cache);
>> } else {
>> msg_Err(p_filter, "Unsupported D3D11VA conversion from 0x%08X to YV12", desc.Format);
>> }
>> @@ -223,8 +221,7 @@ static void D3D11_NV12(filter_t *p_filter, picture_t *src, picture_t *dst)
>> lock.RowPitch,
>> lock.RowPitch,
>> };
>> - CopyFromNv12ToNv12(dst, plane, pitch, src->format.i_width,
>> - src->format.i_height, &sys->cache);
>> + CopyFromNv12ToNv12(dst, plane, pitch, src->format.i_height, &sys->cache);
>> } else {
>> msg_Err(p_filter, "Unsupported D3D11VA conversion from 0x%08X to NV12", desc.Format);
>> }
>> diff --git a/modules/video_chroma/dxa9.c b/modules/video_chroma/dxa9.c
>> index 5a99ac9..9cb7cf3 100644
>> --- a/modules/video_chroma/dxa9.c
>> +++ b/modules/video_chroma/dxa9.c
>> @@ -108,8 +108,7 @@ static void DXA9_YV12(filter_t *p_filter, picture_t *src, picture_t *dst)
>> plane[1] = plane[2];
>> plane[2] = V;
>> }
>> - CopyFromYv12(dst, plane, pitch, src->format.i_width,
>> - src->format.i_height, p_copy_cache);
>> + CopyFromYv12(dst, plane, pitch, src->format.i_height, p_copy_cache);
>> } else if (desc.Format == MAKEFOURCC('N','V','1','2')) {
>> uint8_t *plane[2] = {
>> lock.pBits,
>> @@ -119,8 +118,7 @@ static void DXA9_YV12(filter_t *p_filter, picture_t *src, picture_t *dst)
>> lock.Pitch,
>> lock.Pitch,
>> };
>> - CopyFromNv12(dst, plane, pitch, src->format.i_width,
>> - src->format.i_height, p_copy_cache);
>> + CopyFromNv12(dst, plane, pitch, src->format.i_height, p_copy_cache);
>> } else {
>> msg_Err(p_filter, "Unsupported DXA9 conversion from 0x%08X to YV12", desc.Format);
>> }
>> @@ -153,8 +151,7 @@ static void DXA9_NV12(filter_t *p_filter, picture_t *src, picture_t *dst)
>> lock.Pitch,
>> lock.Pitch,
>> };
>> - CopyFromNv12ToNv12(dst, plane, pitch, src->format.i_width,
>> - src->format.i_height, p_copy_cache);
>> + CopyFromNv12ToNv12(dst, plane, pitch, src->format.i_height, p_copy_cache);
>> } else {
>> msg_Err(p_filter, "Unsupported DXA9 conversion from 0x%08X to NV12", desc.Format);
>> }
>> diff --git a/modules/video_chroma/i420_nv12.c b/modules/video_chroma/i420_nv12.c
>> index 5e0a767..16f4a5b 100644
>> --- a/modules/video_chroma/i420_nv12.c
>> +++ b/modules/video_chroma/i420_nv12.c
>> @@ -131,7 +131,6 @@ static void I420_YUV( filter_sys_t *p_sys, picture_t *p_src, picture_t *p_dst, b
>> };
>>
>> CopyFromI420ToNv12( p_dst, plane, pitch,
>> - p_src->format.i_x_offset + p_src->format.i_visible_width,
>> p_src->format.i_y_offset + p_src->format.i_visible_height,
>> &p_sys->cache );
>> }
>> --
>> 2.8.2
>>
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>
> --
> With my kindest regards,
>
> --
> Jean-Baptiste Kempf
> http://www.jbkempf.com/ - +33 672 704 734
> Sent from my Electronic Device
> _______________________________________________
> vlc-devel mailing list
> To unsubscribe or modify your subscription options:
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