diff options
Diffstat (limited to 'include/media/v4l2-mem2mem.h')
| -rw-r--r-- | include/media/v4l2-mem2mem.h | 44 |
1 files changed, 42 insertions, 2 deletions
diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h index 0b9c3a287061..1d85e24791e4 100644 --- a/include/media/v4l2-mem2mem.h +++ b/include/media/v4l2-mem2mem.h @@ -21,7 +21,8 @@ * callback. * The job does NOT have to end before this callback returns * (and it will be the usual case). When the job finishes, - * v4l2_m2m_job_finish() has to be called. + * v4l2_m2m_job_finish() or v4l2_m2m_buf_done_and_job_finish() + * has to be called. * @job_ready: optional. Should return 0 if the driver does not have a job * fully prepared to run yet (i.e. it will not be able to finish a * transaction without sleeping). If not provided, it will be @@ -33,7 +34,8 @@ * stop the device safely; e.g. in the next interrupt handler), * even if the transaction would not have been finished by then. * After the driver performs the necessary steps, it has to call - * v4l2_m2m_job_finish() (as if the transaction ended normally). + * v4l2_m2m_job_finish() or v4l2_m2m_buf_done_and_job_finish() as + * if the transaction ended normally. * This function does not have to (and will usually not) wait * until the device enters a state when it can be stopped. */ @@ -73,6 +75,11 @@ struct v4l2_m2m_queue_ctx { * struct v4l2_m2m_ctx - Memory to memory context structure * * @q_lock: struct &mutex lock + * @new_frame: valid in the device_run callback: if true, then this + * starts a new frame; if false, then this is a new slice + * for an existing frame. This is always true unless + * V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF is set, which + * indicates slicing support. * @m2m_dev: opaque pointer to the internal data to handle M2M context * @cap_q_ctx: Capture (output to memory) queue context * @out_q_ctx: Output (input from memory) queue context @@ -89,6 +96,8 @@ struct v4l2_m2m_ctx { /* optional cap/out vb2 queues lock */ struct mutex *q_lock; + bool new_frame; + /* internal use only */ struct v4l2_m2m_dev *m2m_dev; @@ -173,6 +182,33 @@ void v4l2_m2m_try_schedule(struct v4l2_m2m_ctx *m2m_ctx); void v4l2_m2m_job_finish(struct v4l2_m2m_dev *m2m_dev, struct v4l2_m2m_ctx *m2m_ctx); +/** + * v4l2_m2m_buf_done_and_job_finish() - return source/destination buffers with + * state and inform the framework that a job has been finished and have it + * clean up + * + * @m2m_dev: opaque pointer to the internal data to handle M2M context + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @state: vb2 buffer state passed to v4l2_m2m_buf_done(). + * + * Drivers that set V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF must use this + * function instead of job_finish() to take held buffers into account. It is + * optional for other drivers. + * + * This function removes the source buffer from the ready list and returns + * it with the given state. The same is done for the destination buffer, unless + * it is marked 'held'. In that case the buffer is kept on the ready list. + * + * After that the job is finished (see job_finish()). + * + * This allows for multiple output buffers to be used to fill in a single + * capture buffer. This is typically used by stateless decoders where + * multiple e.g. H.264 slices contribute to a single decoded frame. + */ +void v4l2_m2m_buf_done_and_job_finish(struct v4l2_m2m_dev *m2m_dev, + struct v4l2_m2m_ctx *m2m_ctx, + enum vb2_buffer_state state); + static inline void v4l2_m2m_buf_done(struct vb2_v4l2_buffer *buf, enum vb2_buffer_state state) { @@ -672,6 +708,10 @@ int v4l2_m2m_ioctl_try_encoder_cmd(struct file *file, void *fh, struct v4l2_encoder_cmd *ec); int v4l2_m2m_ioctl_try_decoder_cmd(struct file *file, void *fh, struct v4l2_decoder_cmd *dc); +int v4l2_m2m_ioctl_stateless_try_decoder_cmd(struct file *file, void *fh, + struct v4l2_decoder_cmd *dc); +int v4l2_m2m_ioctl_stateless_decoder_cmd(struct file *file, void *priv, + struct v4l2_decoder_cmd *dc); int v4l2_m2m_fop_mmap(struct file *file, struct vm_area_struct *vma); __poll_t v4l2_m2m_fop_poll(struct file *file, poll_table *wait); |