From: Hans Verkuil <hverkuil-cisco@xxxxxxxxx> The m2m framework is not quite symmetrical: decoders can process multiple output buffers in job_ready until enough buffers have arrived so a frame can be decoded. However, encoders do not have an equivalent where multiple capture buffers can be used to write the compressed frame. They expect that the provided capture buffer is always large enough to contain the full compressed frame. This patch adds a job_write() callback and a v4l2_m2m_job_writing() function to tell the m2m framework that the job isn't finished but that it is waiting for more capture buffers so it can write the remaining compressed data to the buffers. The first patch adds the support for this to the m2m framework, the second patch adapts vicodec to use it. Let me know if there are any comments! It would be even better if this could be tested in a real stateful encoder. Regards, Hans Hans Verkuil (2): v4l2-mem2mem: add job_write callback vicodec: add encoder support to write to multiple buffers drivers/media/platform/vicodec/vicodec-core.c | 91 +++++++++++++++---- drivers/media/v4l2-core/v4l2-mem2mem.c | 61 +++++++++++-- include/media/v4l2-mem2mem.h | 27 +++++- 3 files changed, 152 insertions(+), 27 deletions(-) -- 2.19.2
